PT-42 along with ship Patrol torpedo boat PT-20 2 , ship Patrol torpedo boat PT-21 2 , PT-22, PT-24, PT-25, PT-26, PT-27, PT-28 were assigned to Midway Island while ship Patrol torpedo boat PT-30 2 and ship Patrol torpedo boat PT-29 2 were assigned to Kure Atoll ( 55 miles west of Midway Island).