With an increase in aircraft from her normal ASW complement of 9 Grumman TBM Avengers and 12 General Motors FM-2 Wildcats to 12 Avengers and 20 Wildcats, "Shamrock Bay" covered Task Groups 79.1 and 79.2 from 31 December 1944 through 8 January 1945, as those groups departed the Admiralties and moved into the Philippines for the Lingayen Gulf invasion of Luzon.