Note: HMS Culver (former name USCG Mendota) was a Sloop of the Banff type, built by Bethlehem Shipbuilding Corp. (Quincy, Massachusetts, U.S.A.). She was launched on 27 November 1928. At 23.31 hours on 31 January 1942, U-105 fired a salvo of four torpedoes at the Sierra Leone convoy SL-93, west of the Bay of Biscay, and observed two hits and a large explosion. Although the U-boat thought that they had hit an ammunition freighter, they had in fact hit HMS Culver (Y 87) (Lt.Cdr. R.T. Gordon-Duff, R.N.) that blew up with the loss of the commanding officer, seven officers and 118 ratings. There were only 13 survivors.
(Our thanks to the researchers at the Aldbury War Memorial, Hertfordshire, England for this Information.
http://www.roll-of-honour.com/Hertfordshire/Albury.html )