submarine had a nerve-wracking morning, as numerous aircraft dropped depth charges in the near vicinity, culminated by the appearance of a Japanese minelayer that made two attacks in shallow water, dropping 20 depth charges. Thoroughly shaken, but suffering only superficial damage, Gabilan evaded her antagonist in a providential heavy rain squall. Her only other diversion en route to Fremantle was an encounter with the British submarine , an approaching target in morning twilight; however, there was sufficient illumination to enable Gabilan to identify Spiteful at the last moment before firing. Fifth and sixth war patrols, March – August 1945 Gabilan conducted the greater part of her fifth war patrol (20 March – 28 May) as a unit of a "wolfpack" that included and Besugo. Patrolling below the Celebes, the pack began an epic four-day chase on 4 April with a morning contact on cruiser Isuzu and her four escorts. One of the escorts fell prey to Besugo, and the elusive cruiser was spotted as she entered Bima Bay on the night of 6 April. Word was flashed to Gabilan, already executing a daring surface attack that left the cruiser listing and down by the bow. With the enemy confused by Gabilans attack, Charr completed the kill with a six-torpedo salvo the next morning (7 April). The demise of Isuzu, last of the Japanese light cruisers to fall victim to a submarine torpedo, was witnessed by British submarine . Gabilan outwitted three escorts to sink a small freighter the morning of 14 April 1945, then scored hits on two cargo ships of another convoy. After a short stay off the coast of Hainan, where she destroyed drifting mines, she returned to Pearl Harbor 28 May for refit. Gabilan'''s sixth and last war patrol (20 June – 17 August 1945) was on lifeguard station for American fliers off Tokyo Bay. She first rescued six men, the crews of two torpedo bombers, then raced well inside Tokyo Bay, in easy range of Japanese shore batteries, to rescue another three-man crew. Six Navy Hellcat fighter planes gave her cover for the mission. On the way out, she paused to destroy a drifting mine with gunfire. On 18 July 1945, the U.S. Navy destroyers and {USS|Wallace L. Lind|DD-703}} opened gunfire on Gabilan at a range of while Gabilan was on the surface in the Pacific Ocean off the Bōsō Peninsula, Honshu, Japan, at . Gabilan