SS Radaas was a 2524-ton cargo steamship. She was built by and launched in 1890 as Marstonmoor for Moor Lines. She was sold to a Greek company in 1902 and renamed Athos Romanos, before being sold to Danish interests during the First World War and renamed Radaas. She was sunk by the German submarine UB-40 under the command of Oberleutnant Hans Howaldt on 21 September 1917.[1] She was 18 miles west of Portland Bill en route from Tyne to Bordeaux when the torpedo struck her in the port side.[2] The wreck lies on a sandy bed at a depth of 30 m at 50.5703°N -3.0806°W.