On 29 April, she steamed to Gonaïves Bay, Haiti, for ASW training on a friendly "bottomed out" submarine and conducted a shore bombardment exercise off Culebra Island the following day. After her rendezvous with in Windward Passage on 3 May, the warships sailed north on an antisubmarine patrol. Although "Benner"s crew dropped 11 depth charges on a possible submarine contact later that day, they later determined it to be a false contact. She parted company with HMS "Reaper" on the 7th and sailed independently for Boston, arriving on 8 May for three weeks of post-shakedown availability. Following those repairs, the destroyer steamed to Norfolk, Virginia, where she joined and in preparation for sailing to the Pacific.