The UGM-89 Perseus was a proposed U.S. Navy submarine-launched anti-ship (AShM) and anti-submarine (ASW) cruise missile that was developed under the Submarine Tactical Missile (STAM) project, which was also referred to as the Submarine Anti-ship Weapon System (STAWS).
UGM-89 Perseus adalah sebuah peluru kendali / rudal jelajah kapal selam anti-kapal (ASHM) dan anti-kapal selam (ASW) yang diusulkan US Navy dikembangkan di bawah proyek Submarine Tactical Missile (STAM), yang juga disebut sebagai Submarine Anti-ship Weapon System (STAWS).