HMS Truculent (P315) HMS Truculent (P315) HMS "Truculent" was a British submarine of the third group of the "T" class. She was built as "P315" by Vickers Armstrong, Barrow, and launched on 12 September 1942. "Truculent" was lost following a post-war accident with a Swedish oil tanker in the Thames Estuary in January 1950. "Truculent" spent much of her World War II wartime service in the Pacific Far East, except for a period in early 1943, operating in home waters. Here, she sank the German submarine U-308, which was on her first war patrol, with all hands. She also took part in Operation
Thames Estuary the coast there are some larger settlements, such as Clacton-on-Sea to the north in Essex, Herne Bay, Kent, and the Southend-on-Sea area within the narrower part of the estuary The River Thames flowing through London is a classic river estuary, with sedimentary deposition restricted through manmade embankments. The district of Teddington a few miles south-west of London's centre marks the boundary between the tidal and non-tidal parts of the Thames, although it is still considered a freshwater river about as far east as Battersea insofar as the average salinity is very low and the fish fauna consists predominantly of freshwater