SS Sagamore was a transatlantic cargo liner that was built in Ireland in 1892 for George Warren's White Diamond Steam Ship Company. In 1913 she was modified to carry passengers as well as cargo. In 1917 a German U-boat sank her, causing the death of 52 members of her crew.
Harland and Wolff built Sagamore in 1892, launching her on 8 September and completing her on 30 November. She was a steel-hulled cargo ship, long, with a beam of and depth of . As built, her tonnages were and . Sagamore had a single screw, driven by a triple expansion engine[1] that was rated at 593 NHP[2] and gave her a speed of 13kn. She had one funnel and four masts.
Sagamores UK official number was 102059 and her code letters were MVQR.[2]
In 1893 Harland and Wolff built a sister ship, Sachem, also for the White Diamond SS Co. Sachem was longer than Sagamore, but the two ships were otherwise similar in specification and appearance.[3]
In 1912 George Warren sold a controlling interest in his White Diamond SS Co to Furness, Withy and Co. In 1913 the new owners had Sagamore and Sachem modified with the addition of accommodation for 60 second class passengers. In Sagamores case this increased her tonnages to and .[4]
By 1914 Sagamore carried a wireless telegraphy installation, operated by the Marconi Company. Her call sign was MPT.
On 17 June 1913 she ran down and sank the American fishing schooner "Olympia" off Sable Island, Nova Scotia, killing six of Olympia's.[5]
On 27 February 1917 Sagamore left Boston on her usual route to Liverpool. On 3 March she was in the Western Approaches when the German U-boat hit her with one torpedo amidships on her port side. She took half an hour to sink, giving her crew time to get clear in three lifeboats. But overnight a gale separated the three boats, and two of them were never seen again.
On 12 March the Blue Funnel Line steamship Deucalion, outbound from the UK to South Africa, found one of Sagamores lifeboats. By then ten men had died in the boat, only seven survivors remained and several were suffering from frostbite. On 6 April Deucalion landed them at Cape Town, where they were hospitalised. In five cases the frostbite had led to gangrene and the men's feet had to be amputated.
Sagamores wreck lies at a depth of more than, about 150nmi northwest of Fastnet Rock.[6] The nearest land is Dunmore Head in County Kerry.
It is in what are now the territorial waters of the Republic of Ireland. Ireland's National Monuments Service records it as wreck number W05890.[7] Being more than a century old, the wreck is automatically protected by the National Monuments (Amendment) Act, 1987, section 3, sub-section (4).[8]