Tinosa sighted a northbound Japanese convoy on 3 May, and "Bang" moved in to pursue its 10 ships. Her first attempt to attack during daylight was foiled by enemy plane and surface escorts which forced her to dive. After dark, she and her colleagues coordinated a surface attack in which "Bang" sank "Kinrei Maru", and claimed the destruction of a destroyer, which was not confirmed by postwar study of Japanese records. Since all of her torpedoes had been expended, "Bang" departed the area on 6 May and arrived at Midway on the 14th for refit alongside .