 Between 26 December and 7 January , Admiral Scheer rendezvoused with the supply ships Nordmark and Eurofeld , the auxiliary cruiser Thor , and the prizes Duquesa and Storstad . The raiders transferred some 600 prisoners to Storstad while they refueled from Nordmark and Eurofeld . Between 18 and 20 January Admiral Scheer captured three Allied merchant ships totalling 18 @,@ 738 gross register tons ( GRT ) , including the Norwegian oil tanker Sandefjord . She spent Christmas 1940 at sea in the mid @-@ Atlantic , several hundred miles from Tristan da Cunha , before making a foray into the Indian Ocean in February 1941 . 
