The West ships were cargo ships of similar size and design built by several shipyards on the West Coast of the United States for the USSB for emergency use during the First World War. All were given names that began with the word West, like West Cobalt,^[5] the ninth of some 30 West ships built by the Columbia River Shipbuilding Company of Portland, Oregon.^[1] West Cobalt (Columbia River Shipbuilding yard number 11)^[1] was launched on 26 October 1918,^[3] and was completed in December.^[1]

West Cobalt was 5,724 gross register tons (GRT), and was 410 feet 1 inch (124.99 m) long (between perpendiculars)^[3] and 54 feet 0 inches (16.46 m) abeam. She had a steel hull that displaced 12,424 t with a mean draught of 24 feet 2 inches (7.37 m).^[2] Her hold was 29 feet 9 inches (9.07 m) deep and she had a deadweight tonnage of 8,028 DWT.^[2] West Cobalt's power plant consisted of a single steam turbine driving a single screw propeller which moved the ship at up to 11 knots (20 km/h).^[3]

Upon completion of West Cobalt in December 1918,^[1] a month after the end of fighting in the First World War, she was handed over to the United States Navy for use in the NOTS. She was commissioned as USS West Cobalt (ID-3836) on 29 December at the Puget Sound Navy Yard in Bremerton, Washington.^[2]

After undergoing sea trials, West Cobalt sailed for San Pedro, California, on 11 January to load a cargo of grain on behalf of the American Relief Administration.^{[2][Note 1]} Six days later, West Cobalt headed for Norfolk, Virginia, where she arrived on 10 February. After fuel replenishment, West Cobalt sailed on 19 February for Plymouth,^[2] where she arrived on 11 March,^[6] the Hook of Holland, and Danzig. After delivering her cargo, used to help feed the hungry in the aftermath of the war, she steamed for New York on 8 April. After reaching New York on 24 April, West Cobalt was decommissioned on 5 May and returned to the USSB.^[2]

Many details of West Cobalt's post-Navy career remain undiscovered, but mentions in shipping reports in contemporary newspapers offer hints at her activities. In 1924, for example, reports in The New York Times mention a departure from New York for Manchester on 27 August,^[7] and an arrival at Liverpool on 8 September.^[8] By 1930, West Cobalt was reported in The Washington Post as sailing on a New Orleans – London route.^[9] On 15 October of that year, the captain and four other officers of West Cobalt were arrested at New Orleans after 12 US quarts (11 L) of liquor—against the law under Prohibition—were found on board the ship. The five men were held under $1,000 bond each.^{[9][Note 2]}

In 1933, West Cobalt was sold to the Lykes Brothers Steamship Company, which assigned her to its Ripley Steamship Company subsidiary.^[10] During the 1930s, Lykes Brothers operated cargo ships between Gulf Coast and Caribbean ports,^[11] and though there is little specific information available regarding West Cobalt's movements, it is likely that she called at Gulf coast and Caribbean ports as well. One specific mention of the ship is found in a report in The New York Times in 1937, when the newspaper reported West Cobalt's arrival in New York on 30 October, ten days after sailing from New Orleans.^[12]

In June 1940, the United States Maritime Commission (USMC) granted permission to Lykes to sell West Cobalt and three other ships to the Bank Line of Glasgow for transfer to British registry.^{[13][Note 3]} West Cobalt, loaded with scrap iron,^[14] sailed from Hampton Roads, Virginia, on 28 June for Halifax. After arriving there on 2 July, West Cobalt sailed the next day in Convoy HX 55 for Liverpool.^[15] On the night of 15/16 July, West Cobalt dropped astern of the convoy and was last sighted at 01:00 by British merchant ship Loch Don.^[16] West Cobalt continued on, however, and reached Liverpool independently on 18 July.^[15]

Soon transferred to the Ministry of War Transport, the newly renamed ship, now named Empire Miniver, was assigned to Andrew Weir & Co. of London for operation.^[10] She sailed from Liverpool in her first wartime convoy under her new name, Convoy OB-205, on 29 August 1940. The convoy dispersed the next day after coming under attack from at least four German submarines: U-59, U-38, U-60, and U-101.^[17][18] Though three ships from the convoy were sunk, two were damaged, and a sixth was a total loss,^[18] Empire Miniver arrived at Hampton Roads, on 15 September and at Baltimore two days later.^[17]

After a nine-day turnaround, Empire Miniver sailed independently to Sydney, Nova Scotia,^[17] with a cargo of 4,500 tons of pig iron and 6,200 tons of steel,^[19] arriving on 2 October.^[17] At Sydney, she joined the ill-fated Convoy SC 7, bound for Newport, for her return journey. The convoy had only a single escort to start with, the sloop Scarborough. The convoy was located by a wolfpack of U-boats from 16 October, and they quickly overwhelmed the convoy, sinking many of the ships. Empire Miniver was torpedoed and sunk by U-99 at 22:06 on 18 October, while some 100 nautical miles (190 km) west by south of Barra Head. Out of a total complement of 38, three crew members were lost. The master and 34 crew members were picked up by Bluebell and were landed at Greenock on 20 October.^[19] Including Empire Miniver, 20 ships—over half of the ships in Convoy SC 7—were sunk by 8 different U-boats.^[20][21]

56°40′N 10°45′W / 56.667°N 10.750°W / 56.667; -10.750