 The new minesweeper conducted shakedown training off the California coast before sailing 3 July 1944 on Pacific escort duty.Until November she steamed between Pearl Harbor and the advance base at Eniwetok, and during the last two months of 1944 operated on this duty in the Palaus.After patrol and escort duty out of Ulithi in early 1945, "Impeccable" departed 19 March 1945 to take part in the amphibious assault on Okinawa.