This is the information page about the shipwreck Hmsm d1, the water chart below shows the wreck in its immediate vicinity. The position of this wreck is 50 19.97 N,3 29.969 W (50.332833, -3.499483)

The texts accompanying this shipwreck are in English 🇬🇧, as they are prepared by the UK Hydrographic Office (UKHO) based on data from UKHO and the hydrographic services of the Netherlands, Belgium and Germany, among others. They include the known details of the wreck and the comments of the cartographers who have checked the position and condition of the wreck over time.

Name: HMSM D1

Length 55.5 meter, width: 5.8 meter, tonnage 508 ton

Cause: hms/m d1 was the prototype for the d-class, the royal navy’s first diesel powered submarines. hms/m d1 was launched in strict secrecy in may 1908, and commissioned in september 1909. the wreck comprises the remains of hms/m d1, a submarine commissioned into the royal navy in 1909. built by vickers at barrow-in-furness, hms/m d1 was the prototype for the d-class, which were historic england advice report 26 april 2021 designed as the first submarines intended for long range offensive operations. on the 23 october 1918 hms/m d1 was expended and scuttled as a target during trials of submarine detection equipment.

Year of registration: 1918

Water depth above wreck: 48 meter, Height above seabed: 40 cm

Known since: 1918, last detected: 2021

Details measurements/cartography: H2061/82 14.9.83 EXAM'D 23.3.83 IN 501955N, 032954W [OGB] USING TRISPONDER [2 LOP]. LEAST E/S DEPTH 44.3 IN GEN DEPTH 48MTRS. NO SCOUR. LIES IN AREA IN WHICH MANY LOBSTER POTS ARE LAID. (HMS HERALD, HI 132). BR STD. HH100/351/01 20.10.89 DIVED MAY 1989. DIVERS REPORT AS CLEARLY A SUBMARINE. COMPLETE AND INTACT. HAS A SINGLE STERN TORPEDO TUBE AND FIN HATCH IS OPEN. LIES NE/SW AND IS ABOUT 37MTRS LONG FROM PLOTTER. THOUGHT POSSIBLY TO BE UB 113. (M R ROWLEY, 17.9.89). NCA. 14.6.00 WITH A SINGLE STERN TUBE THIS IS PROBABLY A UC CLASS BOAT. (I MCCARTNEY, TELECON 14.6.00). 18.4.13 EXAM'D 7.1.13 IN 5019.970N, 0329.969W [WGD]. LEAST M/B DEPTH 42.42 IN GEN DEPTH 48.5MTRS. LEAST W/C DEPTH 38.88MTRS. NO SCOUR. LENGTH 53.0MTRS, WIDTH 8.2MTRS, HT 3.6MTRS. LIES 040/220 DEGS. INTACT. (EMU, HI 1374). AMEND WK 38MTRS IN REVISED POSN. 28.7.21 DIVED IN 2018: The wreck was first charted by the UKHO in 1920. Divers identified the wreck as a complete and intact submarine in 1989 and suggested it may be the remains of UB113. Subsequent reinterpretation has suggested the wreck was in fact the remains of UC49. Both of theseproposed identifications were disproved by the results of the 2018 investigation, as the combination of two forward torpedo tubes, single stern torpedo tube, two propellers and single rudder are not found on UBIII class and the UCII class submarines. The overall dimensions and the shape and position of the conning tower, torpedo tubes and deck fixtures are consistent with the technical plans of HMS/m D1. AMEND WK HMSN D1. 28.7.21 HMSM D1 LOCATED IN 5019.970N, 0329.969W [WGD] HAS BEEN AWARDED SCHEDULED MONUMENT STATUS (The Ancient Monuments and Archaeological Areas Act 1979), DTD 30/4/2021, LIST ENTRY NUMBER 1472317. AMEND "HISTORIC" WITH REST'D AREA 75MTRS RADIUS.
Comment researcher: UK Hydrographic Office

Commentaar onderzoeker: Rest'D area radius 75m.

Position: 50 19.97 N,3 29.969 W

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