At 01.47 hours on 12 Jul, 1942, the Port Hunter (Master John Bentham Bradley), dispersed from convoy OS-33 at 11.00 hours on 11 July, was struck on the port side in the #2 hatch by one torpedo from U-582 west of Madeira and disappeared after several heavy detonations, which were seen as flashes at the horizon by other ships of the convoy. The ship listed heavily to port and sank within two minutes leaving burning fuel oil and debris on the surface. The master, 68 crew members, 14 gunners and five passengers were lost. Three crew members sleeping on deck had been blown into the water and clung to debris until they were picked up at about 08.30 hours by HMS Rother (K 224) (Cdr R.V.E. Case, DSC and Bar, RD, RNR) after being spotted by the British merchant City of Windsor from the same convoy.

The master John Bentham Bradley had been in command of the Port Denison when she was bombed and sunk by a German aircraft on 26 Sep, 1940.