Year 2 Report Appendix
Transcription
Year 2 Report Appendix
Wessex Archaeology Aggregate Levy Sustainability Fund Marine Aggregates and the Historic Environment Wrecks on the Seabed R2 Assessment, Evaluation and Recording Appendix C: Archaeological Results Ref: 57454.03 January 2007 AGGREGATE LEVY SUSTAINABILITY FUND MARINE AGGREGATES AND THE HISTORIC ENVIRONMENT WRECKS ON THE SEABED R2: ASSESSMENT, EVALUATION AND RECORDING APPENDIX C: ARCHAEOLOGICAL RESULTS Prepared for: English Heritage By: Wessex Archaeology Portway House Old Sarum Park Salisbury SP4 6EB Ref: 57454.03 January 2007 ©Wessex Archaeology Limited 2007 Wessex Archaeology Limited is a Registered Charity No.287786 Aggregate Levy Sustainability Fund: Wrecks on the Seabed R2 Year 2 Report WRECKS ON THE SEABED R2: ASSESSMENT, EVALUATION AND RECORDING Appendix C: Archaeological Results Ref: 57454.03 Contents 1 Site WA 1001.........................................................................................................................1 1.1 Introduction ..........................................................................................................................1 Location..................................................................................................................................1 Site Conditions and Environment ...........................................................................................1 Investigation: Survey history and results of previous work....................................................1 1.2 Methodology..........................................................................................................................1 1.3 Results....................................................................................................................................2 Survival: Site layout and extent ..............................................................................................2 1.4 Analysis..................................................................................................................................3 Archaeological Evidence ........................................................................................................3 Build: Construction, Fittings and Machinery..........................................................................3 Use: Artefacts .........................................................................................................................4 Use: The development of the B-24 bomber............................................................................5 Use: Technical Specifications.................................................................................................5 Use: B-24 Liberator bombers in the European war theatre.....................................................5 Loss: B-24 bomber losses during WWII ................................................................................8 Scope for identification of the bomber ...................................................................................9 1.5 Significance of effects and mitigation................................................................................10 Baseline summary.................................................................................................................10 Previous Disturbance ............................................................................................................10 Importance............................................................................................................................10 Impacts .................................................................................................................................11 Effects...................................................................................................................................11 Mitigation .............................................................................................................................11 2 Site WA 1002.......................................................................................................................11 2.1 Introduction ........................................................................................................................11 Location................................................................................................................................11 Site Conditions and Environment .........................................................................................11 Investigation: Survey history and results of previous work..................................................12 2.2 Methodology........................................................................................................................12 2.3 Results..................................................................................................................................12 Survival: Site layout and extent ............................................................................................12 Build: Construction...............................................................................................................12 Build: Fittings and Machinery ..............................................................................................13 Use: Artefacts .......................................................................................................................13 2.4 Analysis................................................................................................................................13 Archaeological Evidence ......................................................................................................13 Documentary Sources...........................................................................................................14 ii Aggregate Levy Sustainability Fund: Wrecks on the Seabed R2 Year 2 Report Use and Loss: An attempt to identify wreck WA 1002 ........................................................14 2.5 Significance of effects and mitigation................................................................................15 Baseline summary.................................................................................................................16 Previous Disturbance ............................................................................................................16 Importance............................................................................................................................16 Impacts .................................................................................................................................16 Effects...................................................................................................................................16 Mitigation .............................................................................................................................16 3 Site WA 1003.......................................................................................................................17 3.1 Introduction ........................................................................................................................17 Location................................................................................................................................17 Site Conditions and Environment .........................................................................................17 Investigation: Survey history and results of previous work..................................................17 3.2 Methodology........................................................................................................................17 3.3 Results..................................................................................................................................17 Archaeological Evidence ......................................................................................................17 Survival: Site layout and extent ............................................................................................18 Build: Construction...............................................................................................................19 Build: Fittings and Machinery ..............................................................................................19 3.4 Analysis................................................................................................................................20 Build: The MS-type uboats...................................................................................................20 Build: The Germania shipyard..............................................................................................21 Use: U-86 Technical Specifications .....................................................................................22 Use: The history of U-86 ......................................................................................................22 Loss: The sinking of U-86 ....................................................................................................24 3.5 Significance of effects and mitigation................................................................................24 Baseline summary.................................................................................................................24 Previous Disturbance ............................................................................................................24 Importance............................................................................................................................25 Impacts .................................................................................................................................25 Effects...................................................................................................................................25 Mitigation .............................................................................................................................25 4 References ...........................................................................................................................26 iii Aggregate Levy Sustainability Fund: Wrecks on the Seabed R2 Year 2 Report WRECKS ON THE SEABED R2: ASSESSMENT, EVALUATION AND RECORDING Appendix C: Archaeological Results Ref: 57454.03 List of Figures Figure 01: Location of site WA 1001. Figure 02: Preliminary site plan of WA 1001. Figure 03: Wing structure of a Consolidated Liberator and leading edge of a wing on the seabed. Figure 04: Engine assembly and mounting of a Pratt & Whitney R-1830 Twin Wasp on a Consolidated Liberator. Figure 05: Details of the Pratt & Whitney R-1830 Twin Wasp engine. Figure 06: Consolidated Liberator flattened tube intercooler. Figure 07: Consolidated Liberator type B-2 turbosupercharger. Figure 08: Consolidated Liberator engine oiltank. Figure 09: Consolidated Liberator hydromatic propeller assembly. Figure 10: Clothing from site WA 1001 Plate 1: Leather strap in structure. Plate 2: Scarf or shirt with floral pattern. Plate 3: Snorkel parka on engine 1. Plate 4: Detail of label on parka. Figure 11: Details of the Consolidated B-24 Liberator. Figure 12: Location of site WA 1002. Figure 13: Site plan of WA 1002. Figure 14: Location of site WA 1003. Figure 15: Site plan of WA 1003 based on multibeam data and dockyard plans of the U-63 type U-boat. Figure 16: Details of bow section of U-86. Figure 17: Details of conning tower section of U-86. Figure 18: Details forward of the conning tower of U-86. Figure 19: Details on the back deck of U-86. Figure 20: Details at the stern of U-86. Figure 21: Dockyard plan of U-86 and photo showing the U-boat surfaced. iv Aggregate Levy Sustainability Fund: Wrecks on the Seabed R2 Year 2 Report WRECKS ON THE SEABED R2: ASSESSMENT, EVALUATION AND RECORDING Appendix C Ref: 57454.03 1 SITE WA 1001 1.1 INTRODUCTION Location 1.1.1 Site WA 1001 is located 18.7nm south east of St. Catherine’s Point on the Isle of Wight. Site Conditions and Environment 1.1.2 The wreck lies at a general depth of 56m. 1.1.3 The seabed on the site consists of sand and silty sand over chalk. According to the geophysical fieldwork report (Wessex Archaeology 2006), the area is covered by NW-SE orientated sandwaves, which implies that the prevailing current is running perpendicular to this. Very little marine growth was observed on the aluminium body of the wreck (Figure 1). Investigation: Survey history and results of previous work 1.1.4 Wreck WA 1001 was first located by the UKHO in 1983. The site was then re-surveyed and positioned in 2003. The UKHO describes the site as a small, possibly intact wooden wreck without debris field. 1.1.5 In 2005 the wreck was located and surveyed with sidescan sonar, multibeam sonar and magnetometer by WA as part of the ‘Wrecks on the Seabed’ project. The results are presented in the geophysical fieldwork report (Wessex Archaeology 2006). Based on the geophysical data, the UKHO interpretation of the site as a small, intact wooden wreck was confirmed. 1.2 METHODOLOGY 1.2.1 In May 2006 site WA 1001 was surveyed to a partial Level 2 with a Seaeye Falcon ROV. Two dives with a combined bottom time of 99 minutes were conducted on 16 May. No further ROV dives were possible due to a long spell of bad weather and strong winds. This has meant that only a portion of the site was surveyed and while site character, date and importance could be established, the site extents remain unknown. The general survey approach is outlined in section 3.1 of the methodological report. 1.2.2 The ROV survey identified WA 1001 as the remains of a four-engined, propeller driven aircraft, probably of World War II vintage. 1 Aggregate Levy Sustainability Fund: Wrecks on the Seabed R2 1.3 Year 2 Report RESULTS Survival: Site layout and extent 1.3.1 The geophysical data for site WA 1001 shows two main anomalies. The largest, termed WA 6100 in the geophysical fieldwork report (Wessex Archaeology 2006), measures 25m x 10m. A number of smaller anomalies were detected in a range of 25m-50m around WA 6100. The other large anomaly, measuring 6m x 1m is located approximately 180m NE of WA 6100. The resolution of the data is not high enough to discern individual features or define the exact shape and nature of the anomalies. 1.3.2 As a result of the constraints placed on the fieldwork by weather conditions only the main anomaly, WA 6100, could be dived and investigated. In addition, the poor underwater visibility made it difficult to gain a clear overview of the site and understanding of the wreck layout. 1.3.3 The most prominent features noted on the site are the remains of four aircraft engines attached to the wings or sections of the wings. Wing 1 lies in a NWSE orientation in the east of the site and the engines designated Engine 1 and Engine 2 are still attached to the wing structure, spaced about 3m apart (Figure 2). 1.3.4 Wing 2 appears to be less coherent and lies in a NE-SW orientation about 11m to the west of Wing 1. Engine 3 is in situ on the wing, but Engine 4 could not be positioned accurately. 1.3.5 The main hull structure of the plane seems to lie in a W-E orientation just north of the wings and appears to be fairly broken up. Most of the surviving structure is partially or fully buried and was probably only recently uncovered. This fact is reinforced by the presence of numerous textiles items, including clothing of American origin, on and around the site. 1.3.6 Due to the limited survey time it was not possible to fully define the site extents or examine any of the outlying anomalies noted around WA 6100. 1.3.7 No bombs, machine guns, small arms or ammunition were observed on the site. However, ordnance may be present and the potentially dangerous character of the site should be noted. 1.3.8 No human remains were observed during the two ROV dives, but the presence of well-preserved clothing on the site suggests the potential for the survival of human remains on the site (see 1.4.9-13). 1.3.9 As the remains of military aircraft, WA 1001 are automatically protected by the Protection of Military Remains Act 1986. The Royal Air Force Personnel Management Agency (PMA) at RAF Innsworth has been informed of the discovery. Because of the likelihood that the aircraft was an American casualty contact was also made with the US Joint POW/ MIA Accounting Command (JPAC) in Hawaii to seek information that could identify the site. In September 2006 a member of JPAC visited Wessex Archaeology to discuss the wreck. Based on the archaeological evidence gathered during the 2 Aggregate Levy Sustainability Fund: Wrecks on the Seabed R2 Year 2 Report ROV survey, JPAC has started a Stage 2 investigation, which involves a review of Missing Aircraft Reports (MACRs) and other documentary sources in the US with the aim of identifying the aircraft and establishing its loss was accompanied by any loss of life. 1.4 ANALYSIS Archaeological Evidence 1.4.1 The archaeological evidence available indicated that wreck WA 1001 is the remains of a four-engined aircraft, probably of WWII vintage. The presence of American clothing on site made a US origin for the aircraft likely. As the B-17 Flying Fortress and the B-24 Liberator were the two most common four engine bombers used by the United States Army Air Force (USAAF) during the Second World War, the aircraft was presumed to be one of the two types. 1.4.2 Preliminary research has shown that the B-17 “My Day” of the 388th Bomber Group crashed into the sea off the Isle of Wight in 1943 (Leal 1987). The 388th Bomber Group association was contacted to find out more about this accident and possibly identify the wreck. Some of the ROV video footage was sent to David Sarson, the curator of the 388th Bomber Group collection to verify whether the wreck could indeed be the remains of a B-17. After a first review of the footage, Mr. Sarson was certain that the remains on the seabed were not part of a B-17 bomber, but could represent either a British four-engined bomber or an American B-24. Full copies of the survey footage were then sent to Mr. Sarson and to Darran Cowd, assistant curator at the RAF Museum in Hendon for more detailed review. 1.4.3 Based on this detailed review of the survey footage, both Mr. Cowd and Mr. Sarson agree that the remains on the seabed are those of a Consolidated B-24 Liberator, lying upside down. The following description of the construction and machinery on the seabed has been compiled with the kind help of Mr. Cowd and Mr. Sarson. Build: Construction, Fittings and Machinery 1.4.4 Most of the wreckage surveyed on site WA 1001 relates to the aircraft wings. At least the centre sections of both wings are fully preserved and lying upside down on the seabed. In both cases the majority of the wing structure is still covered with the aluminium outer skin. Along the leading edges the outer skin is missing. Further wreckage between the two wings and to the north of the preserved wing sections could either relate to the outer wing panels or the fuselage (Figure 3). 1.4.5 The four Pratt & Whitney R-1830 Twin Wasp engines are in situ on the wings and their cowlings are missing. The engine mount assemblies are still attached to the rear of the engines and the inboard and outboard engine mount supports have collapsed onto the underside of the wings (Figure 4). While Engine 1 and 2 on Wing 1 as well as Engine 3 on Wing 2 could be positioned with the help of the USBL system technical problems prevented the accurate positioning of Engine 4. The engine blocks with their 14 twin 3 Aggregate Levy Sustainability Fund: Wrecks on the Seabed R2 Year 2 Report row cylinders are surrounded by the exhaust collector rings. The cylinders are 15cm in diameter (Figure 5). 1.4.6 Each of the engines is associated with a rectangular Harrison or Airsearch flattened tube intercooler. The intercoolers serve to cool the hot compressed air delivered by the superchargers (Figure 6). They are situated behind the firewall at the back of each engine. Loose Type B-2 turbosuperchargers were observed on the seabed in the vicinity of Engine 1 and Engine 2. The superchargers were originally located below and at the rear of the engines (Figure 7). 1.4.7 A round oil tank was observed east of Engine 1 (Figure 8). 1.4.8 Engine 1 and Engine 2 are both associated with hydromatic propellers. On Engine 1, the propeller is lying upside down with the dome buried in the seabed and the nose section facing upwards. The propeller on Engine 2 is lying upright on the seabed south of the engine with the dome facing west and the nose section facing east (Figure 9). Use: Artefacts 1.4.9 Several items made of textile were observed in different areas on the site. Some items were half-buried, while others were entangled in and around wreckage. The generally good state of preservation suggests that the majority of this material was buried until very recently. 1.4.10 Most of the items on site were difficult to recognise. Strips of olive drab material were observed entangled around fuselage. White fabric, possibly parachute silk, was seen in several areas around the wreckage. A leather strap with buckle attached to olive or khaki fabric was stuck in a piece of aluminium fuselage on Wing 2 (Figure 10, Plate 1). 1.4.11 To the west of the wreckage, thin blue fabric with a white floral pattern was seen half buried in a debris field. This could be the remains of either a shirt or possibly a scarf (Figure 10, Plate 2). 1.4.12 The most diagnostic item on the site was the orange lining of an olive flying parka, which was wrapped around Engine 1. A label attached to the lining is decorated with a floral border and reads ‘Original Snorkel Parka’. This type of parka was not a standard military issue item during the Second World War, but looks very similar to the standard issue N-3 snorkel parka introduced with the formation of the USAF in 1947 (Figure 10, Plate 3, Plate 4). 1.4.13 The N-3 Snorkel Parka or heavy flying jacket was based on prototypes tested between 1942 and 1945. It was also very common for soldiers to supplement issued clothing with privately bought items. The Snorkel Parka on the site could thus either be one of the prototypes issued for testing, although the non-military label makes this less likely, or a private item bought by a crewman for protection against the cold at high altitudes in the unpressurised and unheated aircraft. 4 Aggregate Levy Sustainability Fund: Wrecks on the Seabed R2 Year 2 Report Use: The development of the B-24 bomber 1.4.14 The development of the B-24 long range bomber started with a request to the Consolidated Aircraft Corporation to set up a second source production line for B-17 bombers in 1938. The Consolidated chief engineer suggested a different design instead, based around a new wing patent with less drag than the existing B-17 wings. 1.4.15 On 30th March 1939 Consolidated received a contract to build the first prototype of the new bomber designated XB-24. The development went ahead quickly and a number of first production models, called YB-24, were delivered to the RAF in 1940. The B-24D was the first mass produced variant of the Consolidated ‘Liberator’ which was delivered to the USAAF from 1941. Altogether, 2,738 B-24Ds were built. Wartime development then continued through to model B-24M. Most of the later B-24 models were based on the B-24D, with changes in mainly the armament and equipment, as well as attempts to make the bomber lighter to increase performance. A total of 19,203 B-24s of 15 different variants were constructed during the war (392nd BG Association 2006). 1.4.16 Together with the B-17, the B-24 became the most used heavy long range bomber of WWII. Use: Technical Specifications 1.4.17 The technical specifications quoted below are for the B-24D Liberator (National Museum of the United States Air Force 2006) (Figure 11): Span Length Height Wing Area Weight (empty) Weight (max take off) Armament Powerplant Max. Speed Range (5,000lb bomb load) Crew 33.52 m 20.22 m 5.46 m 97.36 m² 15,413 kg 27,216 kg One (usually three) 0.5-in (12.7-mm) nose gun, two in dorsal turret, two in tail turret, two in retractable ball turret and two in waist positions; plus a maximum internal bomb load of 8,000 lb (3,629 kg) Four 1200 hp Pratt & Whitney R-1830-43 Twin Wasp radial piston engines 488 km/h 1730 km 10 Use: B-24 Liberator bombers in the European war theatre 1.4.18 The first Liberators to enter the European war theatre were YB-24s, also called Mark I models, delivered to Britain in March 1941. These were used for trans-Atlantic transport duties and later also for long range antisubmarine patrols in the Battle of the Atlantic by RAF Coastal Command. Mark II models delivered later in 1941 were also used by the RAF Bomber Command. The first bombing raids employing Liberator Mark II’s were carried out by RAF squadrons in the Middle East. 5 Aggregate Levy Sustainability Fund: Wrecks on the Seabed R2 Year 2 Report 1.4.19 After the United States declared war on Germany and Italy on 11 December, 1941, the US Army Air Force entered combat on 11 June, 1942 with an attack on the Romanian oilfields at Ploieúti, carried out by 13 B-24 Liberators (Craven et al. 1983). In August 1942 the first strategic bombing raids on Germany were carried out by units of the 8th Air Force flying from British airfields. The so-called Combined Bomber Offensive, which started in June 1943, involved massive bombing of German occupied areas and plants and factories in Germany by the RAF and the USAAF. 1.4.20 The heavy bombers used by the 8th Air Force were either B-17 Flying Fortresses or B-24 Liberators. The following table gives a breakdown of all British based USAAF units that used Liberator bombers: USAAF 8th Air Force 1.4.21 25th Bombardment Group 446th Bombardment Group 486th Bombardment Group Watton 9/8/1944 – 23/7/1945 Flixton c. 4/11/1943 - c. 7/1945 Sudbury 3/1944 – 8/1945 34th Bombardment Group 448th Bombardment Group 487th Bombardment Group Mendlesham c. 26/4/1944 - c. 25/7/1945 Seething c. 1/12/1943 - c. 7/1945 Lavenham 5/4/1944 – 26/8/1945 44th Bombardment Group 453rd Bombardment Group 489th Bombardment Group Shipham 10/1942 - c. 15/6/1945 Old Buckenham 23/12/1943 – 9/5/1945 Halesworth c. 1/5/1944 – 11/1944 93rd Bombardment Group 458th Bombardment Group 490th Bombardment Group Alconbury 7/9/1942 Hardwick 6/12/1942 – 19/5/1945 Horsham St Faith 1/1944 – 14/6/1945 Eye c. 1/5/1944 – 8/1945 389th Bombardment Group 466th Bombardment Group 491st Bombardment Group Hethel 11/6/1943 – 30/5/1945 Attlebridge 7/3/1944 – 6/7/1945 North Pickenham 2/1944 Metfield 3/1944 North Pickenham 15/8/1944 – 6/1945 392nd Bombardment Group 467th Bombardment Group 492nd Bombardment Group Wendling 7/1943 – 15/6/1945 Rackheath 11/3/1944 – 12/6/1945 North Pickenham 18/4/1944 Harrington 5/8/1944 – 8/7/1945 445th Bombardment Group 482nd Bombardment Group 493rd Bombardment Group Tibenham 4/11/1943 – 28/5/1945 Alconbury 20/8/1943 – 21/5/1945 Elveden Hall 1/1/1944 Debach 4/1944 – 6/8/1945 The following RAF units used Liberator bombers in Europe during the Second World War: 6 Aggregate Levy Sustainability Fund: Wrecks on the Seabed R2 Year 2 Report RAF RAF Coastal Command 120 Squadron RAF Bomber Command 223 Squadron Group: 15, Nutts Corner, County Antrim. Reformed. Liberator I, 06/41. 01/06/41- Group: 100 Oulton, Norfolk. Reformed. Liberator IV, 08/44. 23/08/44- 29/07/45 th rd Group: 15, Ballykelly, Londonderry. Liberator II, 11/41. Liberator III, 07/42. 21/07/41Group: 1, Ballykelly, Londonderry. Liberator VIII, 12/44. Liberator VI, 12/44. 24/03/4404/06/45. Group: 15, Aldergrove, County Antrim. 14/02/43-13/04/43. Group: 18, Tain, Caithness. 01/04/4404/06/45. 206th Squadron Group: 19, St. Eval, Cornwall. Liberator VI, 03/44. Liberator VIII, 03/45. 01/04/44Group: 18, Leuchars, Fife. 01/07/44Group: 16, Oakington, Cambridgeshire. 01/07/45Group: 15, Carew Cheriton, Pembrokeshire. 01/10/39- 07/41. Group: 15, Hooton Park, Cheshire. 01/10/3907/41. Group: 16. Detling, Kent. 03/06/40- 10/06/40. Group: 15, Aldergrove, County Antrim. 01/04/41- 07/41. Group: 15, St. Eval, Cornwall. 01/04/4107/41. Group: 19, St. Eval Cornwall.01/08/41- 10/43. Group: 15, Stornoway.01/08/41- 07/42. Group: 19, Chivenor, Devon. 01/12/41- 07/42. Group: 18 Wick, Caithness. 01/12/41- 07/42. Group: 16 Thorney Island, Hampshire. 01/07/42- 10/43. Group: 18, Tain, Caithness. 01/04/44- 07/45. 224th Squadron Group: 16, Beaulieu, Hampshire. Liberator IIIa, 09/42. Liberator II, 11/42. Liberator V. 01/09/42- 03/43. Group: 19, St. Eval Cornwall. Liberator VI, 12/44. Liberator VIII. 01/04/43- 02/45. Group: 15, Milltown, Cumbria. 01/09/44- 7 Aggregate Levy Sustainability Fund: Wrecks on the Seabed R2 Year 2 Report Group: 19, St. Eval , Cornwall. 01/07/45Group: 18, Thornaby, Yorkshire. 05/09/3904/41. Group: 15, Aldergrove, County Antrim. 13/09/39- 13/12/40. Group: 18, Wick, Caithness. 14/10/39- 04/41. Group: 16, Bircham Newton, Norfolk. 28/10/39- 11/39. Group: 16, Bircham Newton, Norfolk. 19/05/40- 20/05/40. Group: 15, Stornoway, Outer Hebrides. 01/02/42- 04/42. Group: 16, North Coates, Lincolnshire. 01/04/42- 09/42. Group: 19, St. Eval, Cornwall. 01/09/4204/43. Loss: B-24 bomber losses during WWII 1.4.22 While good records of aircraft losses for the USAAF in the Second World War are available, it was difficult to obtain accurate loss records for the RAF. Altogether, the 8th Air Force lost 2,112 B-24 Liberators on operational flights in the European war theatre (Philo 2006). 1.4.23 The following table provides a breakdown of B-24 losses by Bombardment Group, as far as known (Philo 2006): Unit 25th Bombardment Group 34th Bombardment Group 44th Bombardment Group 93rd Bombardment Group 389th Bombardment Group 392nd Bombardment Group 445th Bombardment Group 446th Bombardment Group 448th Bombardment Group 453rd Bombardment Group 458th Bombardment Group 466th Bombardment Group 467th Bombardment Group 482nd Bombardment Group 486th Bombardment Group 487th Bombardment Group 489th Bombardment Group 490th Bombardment Group 491st Bombardment Group 492nd Bombardment Group 493rd Bombardment Group Aircraft lost 153 100 116 127 95 58 101 58 47 47 29 29 47 12 - 8 Aggregate Levy Sustainability Fund: Wrecks on the Seabed R2 1.4.24 Year 2 Report RAF Coastal Command is known to have lost 1,579 aircraft in total during the war. It is not known how many of these were Liberators. RAF Bomber Command lost a total of 9,163 aircraft. Again no further details on aircraft types are available (Gustin 2006). Scope for identification of the bomber 1.4.25 With the limited information available, it is difficult to identify Wreck 1001 or even to narrow down the number of possible candidates. Assuming it is a wartime loss, the plane could have crashed between 1941 and 1945 if it was part of the RAF Bomber Command or Coastal Command, and between 1942 and 1945 if it belonged to the US 8th Air Force. 1.4.26 Although the presence of American clothing on the site suggests a US origin for the plane, this can not be counted as conclusive evidence, as a number of US pilots joined the RAF via Canada before the official involvement of the United States in the war. 1.4.27 RAF Bomber Command losses have been published in an accessible format and can thus easily be checked, although generally very little detail about the crash location is available. In many cases crash locations are given as “MIA, English Channel”. RAF Coastal Command losses have only been published for the period 1939-1941. In this period only one single B-24 crashed on a flight between Scotland and Northern Ireland (McNeill 2003). 1.4.28 Records for the USAAF are more easily accessible at a number of locations on the internet. However, these records are listed by aircraft serial number and cannot be searched by crash location. This means that records for all B24s built would have to be checked to narrow down the number of possible planes. 1.4.29 Another approach would be to check the loss records of individual Bombardment Groups that used B-24s. This is easy for some groups, where veteran associations and researchers have published extensive aircraft lists, but difficult for other groups where such work has not been done. In many cases, the loss information available is not detailed, and many crash records refer to large geographical areas rather than specific positions, especially at sea. 1.4.30 The easiest way to identify the aircraft remains on the seabed would be to obtain serial numbers of either engine parts or the wings and then start a search for those numbers. This would however require further survey work on the site. In the interim, the archaeological evidence gathered during the ROV survey has allowed JPAC to start a Stage 2 investigation, which involves a review of Missing Aircraft Reports (MACRs) and other documentary sources in the US with the aim of identifying the aircraft and establishing its loss was accompanied by any loss of life. Depending on the results of this research further investigation of the wrecks may be proposed by JPAC in future to obtain serial numbers that would positively identify the wreck. 9 Aggregate Levy Sustainability Fund: Wrecks on the Seabed R2 Year 2 Report 1.5 SIGNIFICANCE OF EFFECTS AND MITIGATION 1.5.1 The following section is based on the assessment that is normally carried out during an archaeological desk-based study as part of an aggregate dredging license application. 1.5.2 It assumes that site WA 1001 has been encountered in an aggregate extraction area and based on the information above identifies significant effects and proposes mitigation. Baseline summary 1.5.3 The study area contains the wreck of a Consolidated B-24 Liberator aircraft which was identified by means of a ROV survey. 1.5.4 Based on the result of the geophysical surveys carried out, the site consists of a number of anomalies, the largest of which (WA 6100) could be measured as 25m x 10m. Smaller anomalies are spread in a range of 25m to 50m around WA 6100. Another large anomaly measuring 6m x 1m was detected approximately 180m NE of WA 6100. 1.5.5 Anomaly WA 6100 was surveyed by ROV. It consists of two well preserved aircraft wings and the possible remains of fuselage (Figure 2). Due to the limited bottom time available, no further anomalies could be examined. 1.5.6 No bombs or ammunition were observed during the ROV survey, but ordnance may be present and the potentially hazardous character of the site should be noted. No human remains were seen, but the presence of items of clothing on the site makes the existence and survival of human remains highly likely. 1.5.7 Any crashed military aircraft is automatically protected under the Protection of Military Remains Act 1986. Because the wreck site was previously unknown, the PMA at RAF Innsworth has been informed of the discovery. Previous Disturbance 1.5.8 The preservation of organic material on the site and the relative absence of marine growth indicate that the wreck was covered by sediment until recently. 1.5.9 Fishing gear and the remains of a trawl net indicate that the site has been affected by trawling Importance 1.5.10 As the crash site of one of the most common long range bombers employed by the Allied air forces during WWII, site WA 1001 is of medium archaeological importance. The remains of the aircraft are not rare as a number of B-24 bombers are preserved in museums around the world. 1.5.11 However, as a crashed military aircraft the site is automatically protected under the Protection of Military Remains Act 1986. In addition, the evidence 10 Aggregate Levy Sustainability Fund: Wrecks on the Seabed R2 Year 2 Report for the possible presence of human remains on the site gives the site additional value and status as a war grave (Campbell 2002). Impacts 1.5.12 If this site were located within a proposed aggregate dredging area, possible impacts include direct damage to the wreck structure and contents, disturbance of archaeological contexts, disturbance of human remains that may be present and the destabilisation of the site leading to increased deterioration. 1.5.13 The possible presence of ordnance makes any direct damage to the site potentially hazardous. Furthermore, as wreck material may damage the suction gear of the dredger, it is in the interest of the dredging company to avoid contact with such material. Effects 1.5.14 Dredging within the immediate vicinity of the wreck would have an adverse effect on the archaeological remains and disturb a potential war grave. Dredging might also interfere with live ammunition or bombs that could be present on the site. Mitigation 1.5.15 In general the preferred means of mitigation is the preservation in situ of archaeological material, and in the case of WA 1001 the implementation of an exclusion zone around would be proposed. 1.5.16 Although the ROV survey established the character, date and importance of the site, its full extent could not be defined. To cover all outlying anomalies therefore, a 250m circular exclusion zone around anomaly WA 6100 is proposed. Further ROV surveys of the site extent could be used to refine the size of the exclusion zone. 2 SITE WA 1002 2.1 INTRODUCTION Location 2.1.1 Site WA 1002 is located 13.5nm south of Shoreham on the English South Coast. Site Conditions and Environment 2.1.2 The wreck lies at a general depth of 49m (Figure 12). 2.1.3 The seabed on the site consists of fine sand. The upper deck and side of the wreck are completely covered in marine growth, so that it is difficult to discern individual features. Areas of the wreck that are close to the seabed show little marine growth, and only a few dead-mans-fingers were noted. 11 Aggregate Levy Sustainability Fund: Wrecks on the Seabed R2 Year 2 Report Investigation: Survey history and results of previous work 2.1.4 WA 1002 was located by the UKHO in 1974 and surveyed again in 1980. It was described as a fairly large vessel lying on its starboard side in a dip on the seabed with its bow to the SW. Two masts were noted alongside on the seabed, and two holds were observed. 2.1.5 The wreck was located and surveyed by WA in 2005 as part of the ‘Wrecks on the Seabed’ project. Multibeam sonar data, sidescan sonar data and magnetometer data were collected and interpreted. The results are published in the 2006 geophysical fieldwork report (Wessex Archaeology 2006) and verified the UKHO interpretation of the site as a fairly large wreck lying on its starboard side. 2.2 METHODOLOGY 2.2.1 WA 1002 was surveyed to a partial Level 2a using an ROV in 2006. Altogether five dives with a total bottom time of 262 minutes were conducted on the site using the survey strategy outlined in section 3.1 of the Methodological Report. 2.2.2 It was possible to determine the site extent, general character and its approximate date. However, the importance of the wreck could not be established, in large part due to poor visibility and abundant marine growth which prevented detailed recording on the site. 2.3 RESULTS Survival: Site layout and extent 2.3.1 As described in the UKHO records, the wreck is lying on its starboard side with its bow facing SW. The total length of the vessel is about 63m, but the stern area seems to be damaged so that the original vessel length could have been longer. The beam is ca. 8-10m and the depth in hold ca. 5-6m. The site appears to be coherent with outlying debris only in an area just off the stern in the NE. 2.3.2 No superstructure is preserved, but the upper deck structure seems intact and a number of deck fittings were observed. The upper deck is vertical and facing NW. At least two cargo hatches are visible. The hull appears to be fairly intact with the exception of a large area of damage on the port side 20m from the stern. Here a 6m x 6m hole was seen in the side of the vessel. Inward bent metal plating around the edges of the hole suggests an impact from the outside. As mentioned above, the stern also seems to be damaged. 2.3.3 Due to strong currents and low visibility it was not possible to explore the seabed on the NW side of the shipwreck. The intact upper deck prevented access to the inside of the vessel, so no internal machinery, cargo or ballast could be observed (Figure 13). Build: Construction 2.3.4 Little can be said about the general construction of the vessel, as most areas were covered by dense marine growth. What is clear is that the vessel was 12 Aggregate Levy Sustainability Fund: Wrecks on the Seabed R2 Year 2 Report built from riveted iron or steel plates. One section of hull plating could be surveyed in more detail. It was fastened by two/three rows of 30mm rivets. It was not possible to obtain measurements of the hull plates themselves, the frames or the beams (Figure 13). Build: Fittings and Machinery 2.3.5 Even though the ship’s hull survives almost intact, only a few fittings could be observed and recorded on site WA 1002. This was mainly due to the dense cover of marine growth and the very low visibility. 2.3.6 At the bow, a Hall’s patent stockless anchor was observed secured in the hawsehole. One of the anchor flukes was measured with the ISS scaling camera as being 48cm long and 24cm wide. The distance between the flukes is 42cm (Figure 13). 2.3.7 On the now vertical foredeck, an anchor windlass is still secured to the deck. It is heavily concreted, but a 6cm wide spur wheel and the 7cm wide brake could be recorded. Chain runs from the windlass towards the hawsers. An individual chain link was measured as being 23cm long and 6cm wide (Figure 13). 2.3.8 A 5cm wide iron fitting with a block was attached to the side of the foredeck. This could have been part of the rigging or a davit. 2.3.9 Further aft towards midships, two fairleads were observed. Both have an overall length of 65cm and are 22cm wide. The first is situated just aft of the foredeck. The second fairlead is located just aft of midships. It is associated with a set of bollards which measure 32cm across (Figure 13). 2.3.10 No further fittings or machinery could be observed on the site. As no evidence relating to the propulsion of the vessel could be found, it is unclear whether the wreck represents a steamship or a sailing vessel. Use: Artefacts 2.3.11 With the exception of a single piece of coal noted adjacent to the SE side of the hull, no small finds or artefacts were observed on the site. Although it is possible that the coal represents remains of the cargo or was used as fuel, it could also be intrusive material. 2.4 ANALYSIS Archaeological Evidence 2.4.1 Limited archaeological evidence could be collected during the 2006 ROV survey. WA 1002 represents the remains of a riveted iron or steel steam or sailing vessel which was built at the end of the 19th century or the beginning of the 20th century. The Hall’s patent stockless anchor was first used in 1886 and thus provides a terminus post quem for the construction of the vessel. The general vessel dimensions are: LOA (length overall) 63m, BOA (breadth overall) 8-10m and D (depth in hold) around 5-6m. 13 Aggregate Levy Sustainability Fund: Wrecks on the Seabed R2 Year 2 Report 2.4.2 Although difficult to determine from the available evidence, the general hull shape suggests a steamship rather than a sailing vessel. 2.4.3 The extensive damage to the hull amidships on the port side could have been the cause for the sinking of the vessel. The inward bent hull plating in this area suggests an impact from the outside, such as would be caused by shells, a torpedo or a collision with another ship. Documentary Sources 2.4.4 Because only limited archaeological evidence is available, the only possible approach to identifying wreck WA 1002 is to search lists of lost vessels for the general area such as Richard Larn’s Shipwreck Index (Larn et al. 1995) or George Maw’s book on WW1 Channel wrecks (Maw 1999). 2.4.5 Any lost vessels found which match WA 1002 in dimensions and date can then be checked against the UKHO shipwreck database to see whether they have been identified before. In addition dive guides and the National Monuments Record (NMR) can be checked. 2.4.6 This process leaves a small number of unidentified possible vessels. 2.4.7 The presence of a Hall’s patent anchor on the site indicates that the ship could not have been lost before 1886. As the loss is not recorded, it is highly likely that the vessel sank in either of the two World Wars, when the amount of shipping being sunk made accurate record keeping very difficult. Use and Loss: An attempt to identify wreck WA 1002 2.4.8 2.4.9 Using the method outlined above, the following vessels were identified as possible candidates for wreck WA 1002: Vessel Name Vessel type Vessel dimensions (m) Date of sinking Recorded Sinking Location/ Position Peter der Grosse Gotthard Steamship 03/ 1893 Polpedn Steamship LBD 60.65 x 8.65 x 6.33 LBD 73.24 x 10.72 x 6.22 LBD 78.57 x 11.06 x 5.15 Houlgate Steamship LBD ?, 929t net 22.11.1916 Beachy Head Offshore, not known Beachy Head Offshore, 45nm or 25nm SW Littlehampton Offshore, 20nm S, 50.27.30N, 00.30W Beachy Head Offshore, 24nm WSW? Steamship 03.09.1916 14.11.1916 The Russian steamship Peter der Grosse sank following a collision with the German Preussen when en route from Hamburg to Greenock in Scotland. The vessel was registered in St. Petersburg and owned by the St. Petersburg Dampfschiff Gesellschaft (Steamship Company). The vessel had been built in 1872 by the Norddeutsche Schiffbau Aktiengesellschaft in Kiel. The iron steamship was equipped with two boilers and a two cylinder compound steam engine. No further details about the position of the collision could be found (Larn et al. 1995). 14 Aggregate Levy Sustainability Fund: Wrecks on the Seabed R2 Year 2 Report 2.4.10 The Norwegian steamer Gotthard was torpedoed by UB-25 when en route from Middlesbrough to Rouen with a cargo of cast iron pigs and sulphate. The Gotthard was built in Christiania in 1906. She was equipped with a single boiler and a three cylinder triple expansion steam engine. Two different positions of sinking are recorded for the Gotthard. The English position would put the wreck much further to the South than WA 1002. However, the second position stated in Norwegian sources, would put the wreck in approximately the right area. The Gotthard is 10m longer than the length of WA 1002 measured on the multibeam data, but this could be explained by the apparent damage to the stern area (Larn et al. 1995). 2.4.11 The Polpedn, a steel steamer owned by Farrar, Groves & Co Ltd., London, was sailing from Dunkirk to Ayr in ballast when she was attacked by UB-38. The vessel was torpedoed amidships on the port side and sank within five minutes. The Polpedn was an Admiralty prize (ex Thor), equipped with a three cylinder triple expansion steam engine and a single boiler. Although the recorded sinking position is a fair distance from the position of WA 1002, this could be explained by inaccurate positioning due to the rush in which the vessel was left by the crew. As with the Gotthard, a difference in length between the Polpedn and WA 1002 could be due to the damaged stern on WA 1002. The damaged midship section observed on the wreck would be consistent with the torpedo damage sustained by the Polpedn (Larn et al. 1995, Maw 1999). 2.4.12 The Houlgate was a Canadian steamer of 929 tons net, owned by a French company at the time of sinking. The vessel was en route from Montreal to Le Havre with a cargo of coal, when she was shelled by a German submarine. The crew abandoned the ship and watched it sinking after an explosion in the boiler room. However, there are conflicting reports about the vessel in the British records. A patrol vessel reported finding the ship deserted and afloat the next morning. According to the British reports the vessel sank shortly after it was found. The vessel dimensions are given as 73m x 12m x 4.5m (Maw 1999). 2.4.13 It is difficult to narrow down the search any further and securely identify wreck WA 1002 without additional archaeological evidence. All four vessels above are roughly consistent with wreck WA 1002 in terms of size and date and are reported to have sunk in the approximate area of WA 1002. In addition all were subject to damage of some sort, which could be consistent with the damage observed on the wreck. 2.5 SIGNIFICANCE OF EFFECTS AND MITIGATION 2.5.1 The following section is based on the assessment that is normally carried out during an archaeological desk-based study as part of an aggregate dredging license application. 2.5.2 It assumes that site WA 1002 has been encountered in an aggregate extraction area and based on the information above identifies significant effects and proposes mitigation. 15 Aggregate Levy Sustainability Fund: Wrecks on the Seabed R2 Year 2 Report Baseline summary 2.5.3 The study area contains the wreck of an unidentified steamship dating to the period between 1886 and 1945. An ROV survey was carried out to establish site character, date and importance as well as the extent of the wreck site. 2.5.4 Previously obtained sidescan and multibeam data served as a basis for the ROV survey. Based on the geophysical data, the site measures 60m x 6m and is 8-10m upstanding. A small artefact scatter was observed around the stern of the vessel in the NE. 2.5.5 Although the general character and date of the site could be established, the identity of the wreck remains unknown. Further archaeological fieldwork would be necessary to allow an identification of the site and a full assessment of it significance. 2.5.6 The damage to the wreck noted in the geophysical data and by the ROV survey suggests that WA 1002 may be a casualty of war. It is currently not known however, whether the sinking of the vessel was associated with loss of life. Previous Disturbance 2.5.7 The wreck is structurally fairly coherent, with only the superstructure missing. The damage to the port side of the hull is likely to be associated with the loss of the vessel rather than with post-depositional processes. 2.5.8 Fishing nets and a trawl observed around the site indicate that the wreck has been affected by trawling. Importance 2.5.9 WA 1002 appears to be the remains of a modern steamship, dating to the period between 1886 and 1945. Wrecks of cargo vessels of this date are common around the British Isles and are generally fairly well documented. As the wreck could not be identified however, a more definitive assessment of its archaeological importance is not currently possible. Impacts 2.5.10 Possible impacts include direct damage to the wreck structure and contents, disturbance of archaeological contexts, disturbance of any human remains that may be present and the destabilisation of the site leading to deterioration and corrosion. Effects 2.5.11 Dredging within the immediate vicinity of the wreck would have an adverse effect on the archaeological remains. Mitigation 2.5.12 In general the preferred means of mitigation is the preservation in situ of archaeological material, and in the case of WA 1002 the implementation of an exclusion zone around is proposed. 16 Aggregate Levy Sustainability Fund: Wrecks on the Seabed R2 Year 2 Report 2.5.13 The ROV survey allowed establishing the extents of the site so that the limits of the exclusion zone can be accurately defined. To cover all outlying anomalies, an 80m long and 30m wide oval exclusion zone around WA 1002 would be proposed. 3 SITE WA 1003 3.1 INTRODUCTION Location 3.1.1 WA 1003 is located 25nm south south east of Shoreham. Site Conditions and Environment 3.1.2 The wreck lies at a general depth of 46m (Figure 14). 3.1.3 The seabed on site WA 1003 consists of shelly, fine gravel aggregate which overlies clay. Relatively little marine growth was noted on the site. 3.1.4 The marine life noted on the site included fish species such as conger eel (conger conger), crustacea, gastropods and bi-valves. Investigation: Survey history and results of previous work 3.1.5 The wreck site was originally located by the UKHO in 2003 and described as a largely intact wreck with a moderate magnetic signature. Two possible masts were thought to be present on the site. 3.1.6 In 2005 the wreck was located and surveyed by WA as part of the ‘Wrecks on the Seabed’ project. The survey methodology and interpretation is outlined in the geophysical fieldwork report (Wessex Archaeology 2006). 3.2 METHODOLOGY 3.2.1 Site WA 1003 was surveyed with an ROV to a partial Level 3 in 2006. Altogether five dives with a total bottom time of 291 minutes were conducted in three days on the site. The site was surveyed following the survey strategy outlined in section 3.1 of the Methodological Report. 3.2.2 It was possible to produce a general site record sufficient to establish site extent, character and date as well as to record selected elements on the site in detail. Using the ROV survey data in combination with documentary sources it subsequently proved possible to positively identify the site. 3.3 RESULTS Archaeological Evidence 3.3.1 The ROV survey immediately identified wreck WA 1003 as the remains of a naval submarine or U-boat. The vessel is between 58m and 70m long (the exact length is difficult to determine due to the damaged bow and stern section) and has a beam of ca. 6.5m. It stands 3m proud of the seabed, but is partly buried. The submarine is armed with four torpedo tubes, two bow tubes and two stern tubes. Two deck guns, consistent with guns used on 17 Aggregate Levy Sustainability Fund: Wrecks on the Seabed R2 Year 2 Report German U-boats during WWI were observed. No evidence of mine launching chutes could be found. 3.3.2 The size of the vessel, the absence of mine launching equipment and the general layout suggested that WA 1003 was the wreck of an ocean-going German attack U-boat dating to the First World War. 3.3.3 The ROV survey was informed by the availability on site of the construction and general layout plan of U-63 to U-65, and allowed features observed on the seabed to be compared immediately to this plan. Apart from a number of details on the conning tower, all fittings and machinery were consistent with the plan. It could thus be concluded on site that the U-boat was of the so called Ms, or “Mobilmachungs” (mobilisation) type. Ms boats were built by a number of different shipyards and were constantly improved. This led to a variety of subtypes, all built with slight variations. Each subtype was named after the first boat built to the type specifications (Rößler 1997). 3.3.4 Further studies following the survey season showed that the appearance of the wreck was consistent with the subtype U-81. This type of U-boat was built at the Germania Werft in Kiel between 1915 and 1916. The U-81 type included six boats, U-81 to U-86. Out of these, four were sunk during the war around Ireland or in the Atlantic and one was broken up (Helgason 2006). Only U-86 is stated to have sunk or been sunk in the Channel off the South Coast after having been used by the British Navy in 1921 (McCartney 2003). WA 1003 has thus been identified as the German Ms-type U-boat U-86. 3.3.5 The following description of the wreck was compiled using archaeological evidence in combination with documentary information available for U-86. Survival: Site layout and extent 3.3.6 The vessel is lying on even keel with a slight list to port on the fairly flat seabed in NNW-SSE orientation with the bow in the SSE. The 2005 multibeam survey gives dimensions of 58m x 5m x 3m for the wreck site. Dimensions taken off the sidescan data suggest a length of 66m, a breadth of 6.5m and a height off the seabed of 3.5m for the wreck itself. 3.3.7 The outer hull of the vessel has largely disappeared, but the internal pressure hull is fairly intact. Bow and stern are heavily damaged and broken up from the bow bulkhead forward and the stern bulkhead aft. While the bow has collapsed and is lying partly buried in line with the vessel, the stern section has broken off and is lying at a 90 degree angle to the main hull, pointing westwards. 3.3.8 Apart from the features associated with the damaged bow and stern sections, outlying debris noted around the site consisted mainly of pressure cylinders that have fallen off the pressure hull. A large seabed scour was noted on the eastern side of the wreck (Figure 15). 18 Aggregate Levy Sustainability Fund: Wrecks on the Seabed R2 Year 2 Report Build: Construction 3.3.9 The wreck shows the twin hull construction typical of a U-boat: a pressure resistant inner hull and free flooding outer casing. Documentary sources indicate that the cylindrical pressure hull is built from riveted 12mm nickelsteel plates with external steel frames. According to the same sources the inside of the pressure hull is separated into compartments by a number of bulkheads made from 16-21mm thick steel. The forward and aft collision bulkheads are visible where bow and stern are damaged (Figure 16). 3.3.10 The pressure hull would have been enclosed within a steel outer casing which would have protected it. The rigid connection of outer casing and pressure hull enhances the strength of the pressure hull. On the wreck the outer casing is only partially preserved and the pressure hull is generally well-preserved and clearly visible in the upper deck area. 3.3.11 The conning tower is riveted onto the pressure hull and is fully preserved with only the protective casing and armour missing. Recesses for the navigation lights and maintenance access hatches were observed on both sides of the tower. The main conning tower hatch is situated aft of the periscope mountings and was found slightly ajar (Figure 17). 3.3.12 Two torpedo loading hatches were observed at bow and stern, aft and forward of the torpedo rooms. At the stern of the vessel, the engine room escape hatch is wide open. The forward escape hatch is sealed (Figure 18, 19). 3.3.13 At the bow of the U-boat, the two bow torpedo tubes are split at the forward collision bulkhead. The scaling camera recorded an internal diameter of ca. 58cm for these tubes. The tube construction with outer reinforcement rings and bolted segments is clearly visible (Figure 16). The two stern tubes are heavily damaged and lie at a 90 degree angle to the hull within the stern wreckage. The outer torpedo tube door is visible on one of the aft tubes (Figure 20). Build: Fittings and Machinery 3.3.14 Most of the fittings that were originally located on the upper deck of the Uboat are preserved in situ. The patent anchor is secured in the hawsehole in a recess on the side of the damaged bow section. Using the ISS camera, it was possible to obtain some measurements: The anchor shaft is 13cm wide. The anchor fluke measures 24cm x 20cm. The electrical anchor windlass and capstan is still in situ just aft of the anchor. The opening for the windlass drive shaft can be seen in the collision bulkhead above the two torpedo tubes (Figure 16). 3.3.15 A number of compressed air cylinders were observed on top of the pressure hull along the length of the upper deck. These formed part of the U-boat’s compressed air system which was used to blow air into the dive- and ballast tanks. All cylinders were connected to a compressor in the control room and could be centrally recharged when the U-boat was on the surface. The width of individual air cylinders was measured as 46cm. 19 Aggregate Levy Sustainability Fund: Wrecks on the Seabed R2 Year 2 Report 3.3.16 The U-boat was armed with two upper deck guns forward and aft of the conning tower. The forward gun is still attached to its mounting and trained upward. It is well preserved with a small amount of fishing gear snagged around the barrel. Due to the low visibility and strong currents it proved difficult to obtain accurate measurements with the ISS camera. However it appears that the calibre of the gun is larger than 10cm. The gun is fitted with a horizontally sliding breech block and top-mounted recoil cylinders. A comparison with all small calibre naval guns in use during WWI shows that it might be a German 10.5 cm/45 (4.1") Ubts L/45. This gun was in service from 1907. It was used to arm cruisers, but during World War I was also fitted on destroyers and submarines. A 10.5cm Ubts L/45 gun from U-98 is preserved in the Imperial War Museum, London (D. 2006) (Figure 18). 3.3.17 The aft gun is also attached to its mounting but has fallen over to the port side. This gun appears to be the standard German U-boat gun of WWI, the 8.8 cm/30 (3.46") Ubts L/30. The gun is attached to a circular mounting rather than the collapsible mounting used on some U-boats. The 8.8cm L/30 Schnelladekanone was originally developed for river and coastal gunboats by Krupp in 1898. During WWI it became the standard U-boat armament. An 8.8cm L/30 gun which has been lifted off the wreck of UB-61 is on display in the Bavarian Army Museum in Ingolstadt (Thuro 2006) (Figure 19). 3.3.18 On the conning tower, the mountings for three periscopes are visible. The two main periscope mountings are situated on top of the conning tower, forward of the escape hatch. Both periscopes were operated from the conning tower. The mountings seem to be empty and the periscopes could not be seen. The mounting for the emergency periscope is situated just forward of the conning tower. The emergency periscope was operated from the control room (Figure 17). 3.3.19 The column for the bridge steering wheel is situated forward of the two main periscopes. The main steering controls were located in the conning tower, but additional steering wheels were situated on the bridge, in the control room and aft in the torpedo room. Figure 17 shows the bridge steering column in use in 1916. 3.3.20 The U-boat’s ventilation system has collapsed onto the upper deck and is lying across the hull aft of the conning tower (Figure 19). 3.3.21 At the stern the two propellers are still attached to the shafts. The port propeller is missing one of its blades. An intact blade could be measured with the scaling camera. The blade is 75cm long and 40cm wide (Figure 20). 3.4 ANALYSIS Build: The MS-type uboats 3.4.1 The Ms (Mobilmachungs/ mobilisation) type U-boats were part of the general German mobilisation plan for World War I. The construction of 17 U-boats had been anticipated for the war. Five boats based on U-43 were to be built by the KW Danzig shipyard and another 12 boats, based on U-19, were to be built by the Weser shipyard in Bremen and the Germania shipyard 20 Aggregate Levy Sustainability Fund: Wrecks on the Seabed R2 Year 2 Report in Kiel. These boats were U-51 to 56, U-60 to 62 and U-81 to 91 (Rößler 1997). 3.4.2 Originally, all Ms-boats were to be built without changes according to the plans of the types they were based on. However, the first few months of the war showed that some radical changes were necessary to improve the performance of existing designs. The dive time was reduced from three or four minutes to one minute, all boats were equipped with two deck guns, and the hydroplanes were improved. The Germania shipyard in Kiel also changed the general shape of the hull to improve speed and handling of the boats (Rößler 1997). 3.4.3 The Ms-type U-boats U-81 to U-86 were ordered from the Germania shipyard in Kiel in June 1915, when it was becoming apparent that losses of oceangoing U-boats was affecting the operational capabilities of the German U-boat force. The very short intended construction time of 11 to 12 months necessitated a change of engine. All U-81 type boats were equipped with MAN diesel engines rather than the original GW engines. This meant that while the general appearance and layout of the boats was very similar to the U-63 type boats, the engine room layout was copied from the originally MAN equipped U-51 type (Rößler 1997). Build: The Germania shipyard 3.4.4 In 1863 the shipbuilder Theodor Christian Bruhn founded a shipyard in Gaarden near Kiel. The yard was sold in 1864 and became the “Norddeutsche Schiffbaugesellschaft Berlin”. When this company went bankrupt in 1879, the yard was taken over and renamed to “Schiff- und Maschinenbau AG Germania” in 1882. The Germania shipyard built warships as well as merchantmen, but specialised in torpedo boats. In 1902 the yard was taken over by the large German steel manufacturer Krupp and renamed to “Friedr. Krupp Aktiengesellschaft Germaniawerft”. Krupp modernised and enlarged the yard. 3.4.5 Encouraged by the Spanish engineer Rymondo Lorenzo d’EquevilleyMontjustin, Krupp started building an experimental U-boat, the so called “Forelle” in 1902. Although no further boats of this type were built, the Forelle proved to be very successful and was used to advertise the U-boat building capabilities of the Germania shipyard. In March 1904 the Russian Navy ordered three large U-boats based on the Forelle design, the Karp, Karass and Kambala, and also bought the original Forelle (Rössler 1990). 3.4.6 The success of Germania shipyard U-boats also convinced the German Navy to look into U-boat construction. In 1904 the first German Navy U-boat, U-1 was ordered from the Germania yard. This boat is still preserved in the German Museum in Munich. Throughout the pre-war period and the First World War the Germania yard built a total of 100 U-boats including eight large merchant U-boats/U-cruisers of the Deutschland class. 21 Aggregate Levy Sustainability Fund: Wrecks on the Seabed R2 Year 2 Report Use: U-86 Technical Specifications 3.4.7 U-86 (Construction No 256) was ordered at the Germania shipyard in Kiel on the 23 June 1915. The keel was laid on 5 November 1915. The boat was launched on 7 November 1916. (Rößler 1997) (Figure 21). 3.4.8 The boat had the following technical specifications: Displacement (m³) surfaced Displacement (m³) submerged Length (m) Beam (m) Draught (m) Propulsion Main (no. x hp) Propulsion EL (no. x hp) Fuel Capacity Speed surfaced (kn) Speed submerged (kn) Range surfaced (nm/kn) Range submerged (nm/kn) Armament Crew 808 946 70.1 6.3 4.0 2x 1200 Diesel MAN 2x 600 EM 81+38 16.8 9.1 11200/8 56/5 2 bowtubes, 2 sterntubes, 8 torpedoes (50cm), originally 2 x 8.8cm guns, archaeological evidence for U-86 shows that the bow gun has been replaced by a 10.5cm gun 35 Use: The history of U-86 3.4.9 U-86 was commissioned on 30 November, 1916. Its first commander was Kapitänleutnant Friedrich Crüsemann, who was in charge of the boat until 22 June, 1917. On 23 June, 1917 Kapitänleutnant Alfred Götze took over as commander. Oberleutnant zur See Helmut Patzig was the last commander of U-86. He was appointed on 26 January, 1918 and served on the boat until it was surrendered at the end of the war on 11 November, 1918. 3.4.10 In 1917 and 1918 U-86 was assigned to the 4th U-Flotilla. Altogether the boat conducted 12 patrols (Helgason 2006) and sank a total of 33 ships (125,580 tons), warships excluded. 3.4.11 As an example for the general activity of U-86, information for the year 1918 has been extracted from the German naval war diary. During that year U-86 conducted operations in the Skagerrak, the Irish Sea, the North Sea and the Bristol Channel. The following ships were sunk: - Kafue (6044grt), British steamer, on 1 May; - Medora (5135grt), British steamer, on 3 May; - Leeds City (4298grt), British steamer, on 7 May; - San Andres (1656grt), Norwegian steamer on 12 May; 22 Aggregate Levy Sustainability Fund: Wrecks on the Seabed R2 - Atlantian (9399grt), British steamer, on 26 June; and - Covington (16,339grt), US troop transport, on 1 July. Year 2 Report (Admiralstab der Marine: Abteilung A, 1917-1918). 3.4.12 In 1918 U-86 was involved in one of the worst war crimes committed by a uboat commander during the First World War, the sinking of the British hospital ship Llandovery Castle and the subsequent murder of surviving crew members in the water. 3.4.13 Detailed information on the sinking of the Llandovery Castle and the subsequent trial of U-86’s officers in 1920 has been extracted from the book The Leipzig Trials (Mullins, 1921). 3.4.14 The Llandovery Castle, clearly marked as a hospital ship and known to the German government as such, was en route from England to Halifax with nurses, officers and men of the Canadian Medical Corps on board when she was torpedoed by U-86 in the evening of June 27 1918, about 116nm southwest of Fastnet. Of the 258 persons on board only 24 survived. 3.4.15 According to witness statements at the Leipzig war crime trial the commander of U-86, Oberleutnant zur See Patzig, gave the order to torpedo the Llandovery Castle even though he knew that she was a hospital ship, the sinking of which was illegal under international law and the Hague convention. 3.4.16 After the war Patzig fled the country and only the first and second officer of U-86, Dithmar and Boldt could be arrested and tried for their action in the incident. 3.4.17 Even though the Llandovery Castle sank within ten minutes, a number of boats were lowered successfully and the ship was abandoned in a calm and efficient manner. Three boats ultimately survived the sinking of the vessel undamaged and proceeded to rescue survivors from the water. They were interrupted by Patzig, who intercepted the boats and started interrogating crew members to obtain proof of the misuse of the hospital ship as an ammunition carrier. When no proof could be obtained, Patzig gave the command “Ready for Submerging” and ordered the crew below deck. Only himself, the two accused officers and the boatswain’s mate Meissner stayed on deck. 3.4.18 However the U-boat did not dive, but started firing at and sinking the life boats to kill all witnesses and cover up what had happened. To conceal this event, Patzig extracted promises of secrecy from the crew, and faked the course of U-86 in the logbook so that nothing would connect U-86 with the sinking of the Llandovery Castle. 3.4.19 As a result of the Leipzig trial, both Dithmar and Boldt were sentenced to four years of hard labour. Patzig, with whom the responsibility for the incident rested, was never found and prosecuted. Dithmar and Boldt were 23 Aggregate Levy Sustainability Fund: Wrecks on the Seabed R2 Year 2 Report both released from prison after a few months due to the political changes in Germany. 3.4.20 U-86 was in the first group of U-boats that were handed over to the allies as part of the armistice treaty at the end of the war. She was taken from Brunsbüttel to Harwich on November 20, 1918 (Rößler 1997). From September 1919 to March 1920, U-86 was commissioned into the Royal Navy to test her design and make comparisons with other classes and later designs (McCartney 2003). Loss: The sinking of U-86 3.4.21 After decommissioning, U-86 was dumped at sea at the end of June 1921. The wreck of U-86 was found within 2nm of the historic dumping position. The damage at bow and stern of the U-boat suggests that in addition to flooding the tanks, charges were used to blow off the bow and stern sections. This indicates that rather than sinking due to a parted tow as suggested in Innes McCartney’s book on submarine wrecks in the English Channel (McCartney 2003), U-86 was intentionally scuttled at the position it was found. 3.5 SIGNIFICANCE OF EFFECTS AND MITIGATION 3.5.1 The following section is based on the assessment that is normally carried out during an archaeological desk-based study as part of an aggregate dredging license application. 3.5.2 It assumes that site WA 1003 has been encountered in an aggregate extraction area and based on the information above identifies significant effects and proposes mitigation. Baseline summary 3.5.3 The wreck of a previously unknown submarine was found in the study area. The general site extents could be established by means of sidescan sonar and multibeam survey. Including all outlying debris, the site measures 80m x 50m. 3.5.4 During an extensive ROV survey the site was identified as the German MStype ocean-going WW1 U-boat. Subsequent documentary research has identified the wreck as U-86, which was scuttled in 1921. The wreck is well preserved apart from damage at bow and stern which appears to have been caused during the scuttling of the vessel. Much of the U-boat’s protective outer casing has corroded away or been damaged by trawling, but the pressure hull of the vessel is largely intact. 3.5.5 The U-boat was scuttled without loss of life and it is unlikely that the wreck contains live ammunition. Previous Disturbance 3.5.6 Site WA 1003 has been affected by trawl fishing. Trawl nets were observed around the superstructure of the U-boat. The collapsed stern gun and exhaust 24 Aggregate Levy Sustainability Fund: Wrecks on the Seabed R2 Year 2 Report system aft of the conning tower are also likely to be a result of trawl or net snags. 3.5.7 The survival of large non-ferrous items such as the propeller and torpedo tubes suggest that the site has not been subject to salvage or other types of human interference. Importance 3.5.8 There are no preserved examples of WWI German U-boats anywhere in the world, and these vessels only survive as wrecks on the seabed. U-86 is a particularly well preserved example of a U-boat and is also the only one of the six U-81 series U-boats to have been located and identified. Although construction plans for a number of different German U-boat types survive in the German archives and in private collections, no detailed plans are available for U-86. 3.5.9 The link to the sinking of the Llandovery Castle adds a historical significance to the wreck of U-86. 3.5.10 Due to the rarity of survival and its association with a historical event, WA 1003 can be considered of high archaeological importance. Impacts 3.5.11 Possible impacts include direct damage to the wreck structure and contents, disturbance of archaeological contexts and destabilisation of the site leading to increased decay and corrosion. Effects 3.5.12 Dredging within the immediate vicinity of the wreck would have an adverse effect on the archaeological remains. Mitigation 3.5.13 In general the preferred means of mitigation is the preservation in situ of archaeological material, and in the case of WA 1003 the implementation of an exclusion zone around is proposed. 3.5.14 The ROV survey allowed the establishing of the extents of the site so that the limits of the exclusion zone can be accurately defined. 3.5.15 An exclusion zone measuring 100m in length and 50m in width would be proposed for site WA 1003. 25 Aggregate Levy Sustainability Fund: Wrecks on the Seabed R2 4 Year 2 Report REFERENCES 392nd BG Association, 2006, 'WWW.b24.NET: Second Generation Research', www.b24.net. Admiralstab der Marine: Abteilung A, 1917-1918, Kriegstagebuch Band 2: U-86 der IV U-Flottille. Craven, W. F. and Cate, J. L. (ed.), The Army Air Forces in World War II, Vol I-VI, Washington DC: Office of Air Force History, 1983. D., T., 2006, 'Navweaps', http://www.navweaps.com/Weapons/WNGER_4145_skc06.htm. Campbell, Adele (ed), Military Aircraft Crash Sites: Archaeological guidance on their significance and future management, Swindon: English Heritage, 2002. Gustin, E., 2006, 'Aircraft Strength and Losses', http://www.csd.uwo.ca/~pettypi/elevon/gustin_military/strength.html. Helgason, G., 2006, 'WW1 U-boats: U-86', http://uboat.net/wwi/boats/index.html?boat=86. Larn, R. and Larn, B., 1995, Shipwreck Index of the British Isles. Volume 2: Hampshire Isle of Wight Sussex Kent(Mainland) Kent (Downs) Goodwin Sands Thames, London. Leal, H. J. T., 1987, The History of Air Attack 1939-1945: Battle in the Skies over the Isle of Wight, Newport. Maw, N., 1999, World War One Channel wrecks: Vessels lost in the English Channel 1914-1918, Teddington. McCartney, I., 2003, Lost Patrols. Submarine Wrecks of the English Channel, Penzance. McNeill, R., 2003, ROYAL AIR FORCE COASTAL COMMAND LOSSES of the Second World War Vol.1: Aircraft and Crew Losses 1939-1941, Hersham. Mullins, C., 1921, The Leipzig Trials, London. National Museum of the United Staes Air Force, 2006, 'Consolidated B-24D ''Liberator''', http://www.wpafb.af.mil/museum/research/bombers/b2-38.htm. Philo, T., 2006, '8th AF Combat Losses in World War II', http://www.taphilo.com/history/8thaf/8aflosses.shtml. Rössler, E., 1990, Die deutschen Uboote und ihre Werften: eine Bilddokumentation über den deutschen Ubootbau von 1935 bis heute, Bonn. 26 Aggregate Levy Sustainability Fund: Wrecks on the Seabed R2 Year 2 Report Rössler, E., 1997, Die Unterseeboote der Kaiserlichen Marine, Bonn. Thuro, J., 2006, 'U-boot Museen in Deutschland', http://www.juergenthuro.de/html/8_8_wki.html. Wessex Archaeology, 2006, 'Wrecks on the Seabed R2: Assessment, Evaluation and Recording. Geophysical Report', Unpublished Report, 57452. 27 1001 1001 Seazone Licence Number 102003.005 NOT TO BE USED FOR NAVIGATION Digital data reproduced from Ordnance Survey data © Crown Copyright 2005. All rights reserved. Reference Number: 100020449. This material is for client report only © Wessex Archaeology. No unauthorised reproduction. Date: Wessex Archaeology Location of site WA 1001. Scale: Path: 15_01_07 1:2,500 Revision Number: Illustrator: 1 KMN S:\Wrecks_on_the _Seabed\57454E\DO\RepFigs\Fieldwork report Vol_2 Figure 1 Site plan of WA 1001 based on available data. Wessex Archaeology Possible fuselage Scarf/shirt Exhaust Leather strap Engine 3 This material is for client report only © Wessex Archaeology. No unauthorised reproduction. Possible wing g2 Curved pipe Intake Engine 4 ? Metal boxes Possible fuselage Engine 2 Tube Illustrator: Revision Number: KMN 0 Figure 2 S:\Wrecks_on_the _Seabed\57454E\DO\RepFigs\FieldworkRepVol_2\06_08_04 1:100 Path: 09/08/06 Date: Wing 1 upside down Scale: Engine 1 Snorkel parka Brac Brackets Plate A: Leading edge on wing 1, front view. Plate B: Leading edge on wing 1 top view. Plate C: Leading edge on wing 1 top view. Wessex Archaeology Date: 04/08/06 Path: S:\Wrecks_on_the _Seabed\57454E\Drawing Office\Report Figures\Fieldwork report Vol_2\06_08_04 Illustrator: Wing structure of a Consolidated Liberator and leading edge of a wing on the seabed. KMN Figure 3 Turbosupercharger Engine mount assembly Reproduced from Consolidator B-24 Liberator technical manual. Engine Plate A: Side view of engine assembly and mounting of engine 1. Wessex Archaeology Date: 04/08/06 Path: S:\Wrecks_on_the _Seabed\57454E\Drawing Office\Report Figures\Fieldwork report Vol_2\06_08_04 Illustrator: KMN Engine assembly and mounting of a Pratt & Whitney R-1830 Twin Wasp on a Consolidated Liberator. Figure 4 Details of the Pratt & Whitney R-1830 Twin Wasp engine. Wessex Archaeology Plate B: Close-up view of twin row cylinders on engine 1. Plate A: Photographs of a Pratt & Whitney R-1830 Twin Wasp engine. Figure 5 Path: KMN 04/08/06 S:\Wrecks_on_the _Seabed\57454E\DO\RepFigs\Fieldwork report Vol_2\06_08_04 Date: Illustrator: Plate C: Details of cylinders and exhaust collector ring on engine 2. Consolidated Liberator flattened tube intercooler. Wessex Archaeology Plate B: Close-up view of flattened tube intercooler on wing 1. Reproduced from Consolidated B-24 Liberator technical manual. KMN Figure 6 07/08/06 S:\Wrecks_on_the _Seabed\57454E\DO\RepFigs\Fieldwork report Vol_2\06_08_04 Path: Illustrator: Reproduced from Consolidated B-24 Liberator technical manual. Date: Plate C: Position of intercooler in engine arrangment. Plate A: Top view of flattened tube intercooler on wing 1. Consolidated Liberator type B-2 turbosupercharger. Wessex Archaeology Plate C: Photograph of supercharger on existing B-24. Plate A: Turbosupercharger on engine 2. Figure 7 Path: KMN 07/08/06 S:\Wrecks_on_the _Seabed\57454E\DO\RepFigs\Fieldwork report Vol_2\06_08_04 Date: Illustrator: Plate D: Detailed technical drawing of supercharger reproduced from Consolidated B-24 Liberator technical manual. Plate B: Turbosupercharger on engine 1. Plate A: Top view of oiltank on wing 1. Plate B: Side view of oiltank on wing 1. Oiltank Engine Turbosupercharger Plate C: Oiltank arrangement reproduced from Consolidated B-24 Liberator technical manual. Wessex Archaeology Consolidated Liberator engine oiltank. Date: 07/08/06 Path: S:\Wrecks_on_the _Seabed\57454E\Drawing Office\Report Figures\Fieldwork report Vol_2\06_08_04 Illustrator: KMN Figure 8 Plate A: Propeller on engine 2. Distributor valve spring housing Dome breather hole-nut Dome Lock screw dome retaining nut Piston Stationary cam Barrel-front half Rotating cam Cam slot roller Stop locating plate Dome retaining nut Limit stop rings Rotating cam bevel gear Chevron packing Blade butt gear segments Propeller retaining nut Plate B: Propeller on engine 1. Blade Packing nut Barrel bolt Barrel-rear half Thrust washer Propeller drive shaft Governor Engine nose section Plate C: Illustration of propeller reproduced from Consolidated B-24 Liberator technical manual. Wessex Archaeology Date: 07/08/06 Path: S:\Wrecks_on_the _Seabed\57454E\Drawing Office\Report Figures\Fieldwork report Vol_2\06_08_04 Consolidated Liberator hydromatic propeller assembly. Illustrator: KMN Figure 9 Plate 4: Detail of label on parka. Plate 2: Scarf or shirt with floral pattern. Clothing from the Consolidated Liberator. Wessex Archaeology Plate 3: Snorkel parka on engine 1. Plate 1: Leather strap in structure. Figure 10 Path: KMN 04/08/06 S:\Wrecks_on_the _Seabed\57454E\DO\RepFigs\Fieldwork report Vol_2\06_08_04 Date: Illustrator: Reproduced from History Preservation Association, http://historypreservation.com. Details of the Consolidated B-24 Liberator. Wessex Archaeology Pilot tube Truss Power plant (engine) Wing centre section Forward section Reproduced from Consolidated B-24 Liberator technical manual. Element recognised on seabed Nose landing gear Bottom panel assembly Bomber's enclosure Radio operator's floor Pilots' floor Main landing gear Nose section upper flight deck Pilots' enclosure Floor Fuselage top deck Deck assembly Power turret Door bulkhead Leading edge Engine mount support Turbosupercharger Flap Stabilizer vertical Wing tip Outer panel trailing edge KMN Figure 11 04/08/06 S:\Wrecks_on_the _Seabed\57454E\DO\RepFigs\Fieldwork report Vol_2\06_08_04 Path: Illustrator: Leading edge Outer wing panel Aileron Centre section trailing edge Stabilizer horizontal Rudder Date: Engine mount assembly Bomb bay doors Bomb rack Power turret Tail bumper gear Fuselage Tail turret Elevator assembly 1002 1002 Seazone Licence Number 102003.005 NOT TO BE USED FOR NAVIGATION Digital data reproduced from Ordnance Survey data © Crown Copyright 2005. All rights reserved. Reference Number: 100020449. This material is for client report only © Wessex Archaeology. No unauthorised reproduction. Date: Wessex Archaeology Location of site WA 1002. Scale: Path: 15_01_07 1:5000 Revision Number: Illustrator: 1 KMN S:\Wrecks_on_the _Seabed\57454E\DO\RepFigs\Fieldwork report Vol_2 Figure 12 Site plan of WA 1002. Wessex Archaeology Anchor fluke. Riveted plating. Rigging fastening. Patent anchor Anchor shank in hawser hole Seabed Bow in section Sketch plan Hull Bow Anchor in hawser hole Rigging fastening Anchor windlass Deck beams Forward cargo hatch Bollards Split metal tube This material is for client report only © Wessex Archaeology. No unauthorised reproduction. Riveted hull plating Anchor windlass. Anchor chain. Bollards. Hole in hull Illustrator: Revision Number: Fairlead. Dense marine growth on hull KMN 0 Scour Figure 13 S:\Wrecks_on_the _Seabed\57454E\DO\RepFigs\FieldworkRepVol_2\06_08_04 1:200 Path: 09/08/06 Date: Scale: Piece of coal Buckled metal planking in portside Upper deck Scour Stern 1003 1003 Seazone Licence Number 102003.005 NOT TO BE USED FOR NAVIGATION Digital data reproduced from Ordnance Survey data © Crown Copyright 2005. All rights reserved. Reference Number: 100020449. This material is for client report only © Wessex Archaeology. No unauthorised reproduction. Date: Wessex Archaeology Location of site WA 1003. Scale: Path: 15_01_07 1:5000 Revision Number: Illustrator: 1 KMN S:\Wrecks_on_the _Seabed\57454E\DO\RepFigs\Fieldwork report Vol_2 Figure 14 ss dl a in rly ai lf H ul ct ta in o ed rp To ng di lo a en op Ai r de Fo r o rw n ard de g ck un cy lin e Es ca p Detail plan ch ha t ck de ris eb D n ro de in yl rc Ai on ck de H Es Scale 1:500 (v Co en ll Af til ap Pi at se tg ng pe ol io d un d s n p to a l an ip yi ly w ja n in e er d s r g g ex o on on ha n d d si us ec ec de t) k k ni on C U-63 section (reversed) is courtesy of Tony Lovell of www.dreadnoughtproject.org U-86 plan from Bibliothek für Zeitgeschichte in der Würtembergischen Landesbibliothek, Marinearchiv This material is for client report only © Wessex Archaeology. No unauthorised reproduction. se d cl o Bow Anchor Bow broken at bulkhead Anchor windlass Torpedo loading hatch Forward gun Escape hatch Pipes Conning tower Pipes Aft gun lying on side Escape hatch open Torpedo loading hatch Stern broken at bulkhead Propeller Site plan of WA 1003 based on multibeam data and dockyard plans of the U-63 type u-boat. Wessex Archaeology h tc ha Longitudal section (reversed) based on U-63 type sub bl e vi si rw ch o An rly le a rc ch o An Outline base U-86 type sub Damaged torpedo tube Stern ca pe ha tc h op en do To rp e h tc ha rp e do tu Bu be lk he Pr op ad le el r Illustrator: Revision Number: KMN 0 Scale 1:200 Metal casing corroded Damaged hull Figure 15 S:\Wrecks_on_the _Seabed\57454E\DO\RepFigs\FieldworkRepVol_2\06_08_04 to 1:500 plan 1:200 elevation ed Path: 09/08/06 am ag Scale 1:50 Scale: Date: g in ad lo D Bow section angled towards seabed Torpedo tube fully exposed Portside broken up Anchor windlass Bow broken at bulkhead Wessex Archaeology Details of bow section of U-86. D Plate A: Anchor. A B C Plate D: Hull structure at the bow. Plate B: Windlass. U-63 plan is courtesy of Tony Lovell of www.dreadnoughtproject.org KMN Figure 16 Path: Illustrator: 04/08/06 S:\Wrecks_on_the _Seabed\57454E\DO\RepFigs\Fieldwork report Vol_2\06_08_04 Date: Plate C: Torpedo tube in forward collision bulkhead. The windlass driveshaft is visible above the torpedo tube. Details of conning tower section of U-86. Wessex Archaeology Plate C: Conning tower. Plate B: Periscope mountings with steering column in foreground. Plate A: Steering column forward of periscope mountings. Plate D: Conning tower hatch open. C A Figure 17 Path: Illustrator: 04/08/06 S:\Wrecks_on_the _Seabed\57454E\DO\RepFigs\Fieldwork report Vol_2\06_08_04 Date: KMN Plate F: Front view of U-86 conning tower, 1917. Plate E: Conning tower of U-86 in 1916. The steering column and periscope mountings are clearly visible. The metal casing visible in the photograph has corroded away. D U-63 plan is courtesy of Tony Lovell of www.dreadnoughtproject.org Archive U-boat photographs from www.juergenthuro.de Archive photographs from the Bibliothek fuer Zeitgeschichte in der Wuertembergischen Landesbibliothek, Marinearchiv. B Details forward of the conning tower of U-86. Wessex Archaeology Plate C: Forward 10.5cm Ubts L/45 gun. Plate A: Forward escape hatch. Plate B: Forward torpedo loading hatch. B U-63 plan is courtesy of Tony Lovell of www.dreadnoughtproject.org Archive U-boat photographs from www.juergenthuro.de Archive photographs from the Bibliothek fuer Zeitgeschichte in der Wuertembergischen Landesbibliothek, Marinearchiv. C KMN Figure 18 04/08/06 S:\Wrecks_on_the _Seabed\57454E\DO\RepFigs\Fieldwork report Vol_2\06_08_04 Path: Illustrator: Plate D: Engineer leaning against gun on the fore-deck of a U-86 in June 1917. Date: A Details of the rear gun of U-86. Wessex Archaeology Plate A: 8,8cm U-Boot Schnelladekone L/30 on its side on the back deck of U-86. U-63 plan is courtesy of Tony Lovell of www.dreadnoughtproject.org Archive U-boat photographs from www.juergenthuro.de Archive photographs from the Bibliothek fuer Zeitgeschichte in der Wuertembergischen Landesbibliothek, Marinearchiv. KMN Figure 19 Path: Illustrator: 04/08/06 S:\Wrecks_on_the _Seabed\57454E\DO\RepFigs\Fieldwork report Vol_2\06_08_04 Date: Plate C: Back deck of a U-86 in Bristol 1919. Plate B: 8,8cm U-Boot Schnelladekone L/30 preserved in the Bayrisches Armeemuseum, Ingolstadt. Details on the back deck of U-86. Wessex Archaeology Plate A: Debris of exhaust system aft of conning tower. Plate B: Debris on back deck. U-63 plan is courtesy of Tony Lovell of www.dreadnoughtproject.org Archive U-boat photographs from www.juergenthuro.de A Path: Date: B Illustrator: KMN C Figure 20 S:\Wrecks_on_the _Seabed\57454E\DO\RepFigs\Fieldwork report Vol_2\06_08_04 04/08/06 Plate C: Aft torpedo loading hatch. Plate A:Damaged torpedo tube. A B Plate B: Propeller. U-63 plan is courtesy of Tony Lovell of www.dreadnoughtproject.org Wessex Archaeology Details at the stern of U-86. Date: 09/08/06 Path: S:\Wrecks_on_the _Seabed\57454E\Drawing Office\Report Figures\Fieldwork report Vol_2\06_08_04 Illustrator: KMN Figure 21 0 15 m Plan reversed A: Plan of U-86 (Roessler 1997). B: U-86 surfaced under British flag as H.M. Submarine U-86, photograph from the Bibliothek fuer Zeitgeschichte in der Würtembergischen Landesbibliothek, Marinearchiv. Wessex Archaeology Date: 04/08/06 Path: S:\Wrecks_on_the _Seabed\57454E\Drawing Office\Report Figures\Fieldwork report Vol_2\06_08_04 Dockyard plan of U-86 and photo showing the u-boat surfaced. Illustrator: KMN Figure 22 WESSEX ARCHAEOLOGY LIMITED. Head Office: Portway House, Old Sarum Park, Salisbury, Wiltshire SP4 6EB. Tel: 01722 326867 Fax: 01722 337562 [email protected] www.wessexarch.co.uk London Office: Unit 113, The Chandlery, 50 Westminster Bridge Road, London SE1 7QY. Tel: 020 7953 7494 Fax: 020 7953 7499 [email protected] www.wessexarch.co.uk Registered Charity No. 287786. A company with limited liability registered in England No. 1712772.