washington u.s. navy dismiss two senior officer monday series collisions involve seventh fleet warships asia cite loss confidence ability command rear admiral charles williams commander task force 70 captain jeffrey bennett commander destroyer squadron 15 fire seventh fleet commander vice admiral phil sawyer navy say august sawyer replace fleet commander vice admiral joseph aucoin fire accidents reliefs due loss confidence ability command navy statement say shakeup seventh fleet command follow pre-dawn collision guided-missile destroyer uss mccain merchant vessel east singapore malaysia aug. 21 kill 10 sailors fourth major incident u.s. pacific fleet year june another destroyer uss fitzgerald collide philippine cargo ship kill seven u.s. sailors several officer also relieve administrative action take members ship watch team u.s. navy fire two commanders asia sea accidents