Trout stood out to sea on 12 August to patrol the Surigao Strait and San Bernardino Strait en route back to Pearl Harbor. On 25 August, she battled a cargo-fisherman with her deck guns and then sent a boarding party on board the Japanese vessel. After they had returned to the submarine with the prize's crew, papers, charts, and other material for study by intelligence officers, the submarine sank the vessel. Three of the five prisoners were later embarked in a dinghy off Tifore Island.
