Convoy MW13 consisted of four merchant ships[REF] and escort (15th Cruiser Squadron[REF] and 14th Destroyer Flotilla[REF]) that departed from Port Said on 16 November.
The escort detached early on 17 November to refuel at Alexandria, being replaced by "Hunt"-class destroyers of the 12th Flotilla,[REF] and rejoined at dawn on the following day [REF].