The Fort ships were a class of 198 cargo ships built in Canada during World War II for use by the United Kingdom under the Lend-Lease scheme. They all had names prefixed with "Fort" when built. The ships were in service between 1942 and 1985, with two still listed on shipping registers until 1992. A total of 53 were lost during the war due to accidents or enemy action. One of these, , was destroyed in 1944 by the detonation of 1,400 tons of explosive on board her. This event, known as the Bombay Explosion, killed over 800 people and sank thirteen ships. Fort ships were ships transferred to the British Government and the Park ships were those employed by the Canadian Government, both had the similar design. Description The Fort ships were long with a beam of . They were assessed at . The ships were of three types, the "North Sands" type, which were of riveted construction, and the "Canadian" and "Victory" types, which were of welded construction. They were built by eighteen different Canadian shipyards. Their triple expansion steam engines were built by seven different manufacturers. History The ships were built between 1941 and 1945 by ten different builders. The first to be built was , which was laid down on 23 April 1941 and launched on 15 October. The eight ships built by Burrard Dry Dock cost $1,856,500 each. During World War II, 28 were lost to enemy action, and four were lost due to accidents. Many of the surviving 166 ships passed to the United States Maritime Commission. The last recorded scrapping was in 1985, and two ships, the former and , were listed on Lloyd's Register until 1992. Crew Park ships were armed. There were merchant seamen gunners. Also many British and Canadian merchantmen carried volunteer naval gunners called Defensively equipped merchant ship or DEMS gunners. The American ships carried Naval Armed Guard gunners. Merchant seamen crewed the merchant ships of the British Merchant Navy which kept the United Kingdom supplied with raw materials, arms, ammunition, fuel, food and all of the necessities of a nation at war throughout World War II literally enabling the country to defend itself. In doing this they sustained a considerably greater casualty rate than almost every branch of the armed services and suffered great hardship. Seamen were aged from fourteen through to their late seventies. The lost are