It is recorded
here and
here that;
8 Feb 1941. The (U-37) boat spotted the convoy HG 53 late on Feb 8, 1941. She attacked on the 9th and sank 3 ships during the next 2 days but she also brought in Condor aircraft from 2/KG 40 which attacked on the 9th that sank 5 more ships. The heavy cruiser Hipper is also vectored in to the scene but only finds a straggler on the 11th, sinking her.
9 Feb 1941
HMS Deptford (Lt.Cdr. G.A. Thring, DSO, RN) picks up 26 survivors from the British merchants Couland and Estrellano that were torpedoed and sunk by the German submarine
U-37 about 160 nautical miles south-west of Cape St. Vincent, Portugal in position 35º53'N, 13º13'W. One of them died of wounds and was buried at sea the next day.
regards
Ian