JW 55A consisted of 19 merchant ships which departed from
Loch Ewe on 12 December 1943. Close escort was provided by the destroyer
Westcott and two minesweepers. There was also an Ocean escort, comprising the destroyer
Milne (Capt. IMR Campbell commanding) and seven other
Home Fleet destroyers. The convoy was also accompanied initially by a local escort group from Britain, and was also joined later by a local escort group from
Murmansk. A cruiser cover force comprising
Belfast (V.Adm
R Burnett commanding),
Norfolk, and
Sheffield also followed the convoy, to guard against attack by surface units. Distant cover was provided by a Heavy Cover Force comprising the battleship
Duke of York, the cruiser
Jamaica and four destroyers under the command of
V Adm. Bruce Fraser. JW 55A was opposed by a U-boat force of eight boats in a patrol line, code-named
Eisenbart, in the
Norwegian Sea. A surface force comprising the battleship
Scharnhorst and five destroyers was also available, stationed at
Altenfjord. ==Action==