 There, she guarded the cryolite mine—which provided ore vitally needed for the production of aluminum—from the 16th to the 26th.During the last half of 1942, "Tampa" – designated WPG-48 in or around February 1942 – conducted 12 more convoy escort missions between Iceland, Greenland, and Nova Scotia.She left Argentia on 1 January 1943 with "Tahoma" (WPG-80), bound for St. John's where she arrived soon thereafter.