after shakedown training in the chesapeake bay area during april, "trapper" got underway on 11 june and proceeded – via manzanillo, cuba, the panama canal, and san diego — to the pacific ocean war zone. in mid-august, while the minelayer was en route to hawaii, japan capitulated. the ship arrived at pearl harbor on 21 august and was routed westward, via eniwetok, saipan, and okinawa, to japan.