Following her shakedown training in Chesapeake and Casco Bays, "Implicit" sailed from Norfolk, Virginia, 21 April 1944 on convoy duty to Bermuda. She steamed between Norfolk and Caribbean ports on escort duty until returning to Hampton Roads 16 June 1944. The ship then prepared for her part in the invasion of southern France, sailing 24 July 1944 with transports bound for Oran, Algeria. She arrived off southern France 20 August 1944, 5 days after the initial landings, and began a daily schedule of minesweeping and patrolling. She disposed of many floating mines, and exchanged fire with a shore battery 6 and 10 September 1944. "Implicit" sailed from San Rafael for Bizerte 23 October 1944 where she conducted minesweeping exercises.