After making rendezvous with its ocean escort ON 92 proceeded west, following along the great circle route to reduce distance. At 1749 Gleaves sighted a U-boat 17 miles (27 km) ahead and both proceeded to attack, continuing until after midnight. It was escorted by mid-ocean escort group A-3, comprising the United States Navy destroyer Gleaves (Capt. At this point Gleaves and Spencer rejoined the convoy and no more attacks developed.