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 Proteus.