The latest status of USA naval shipborne high-energy laser programs including technology,subsystem and prototype demonstrations,is assessed in detail. There are three fundamental approaches to highand medium-power laser energy:incoherent beam-combining fiber lasers,solid -state slab lasers and free electron lasers. Electrically based solid-state and fiber lasers with improved efficiency and power levels have enabled transportable tactical applications on aircraft,ground vehicles,and ships. Free electron lasers,with the promise of high power,high -beam quality,high efficiency,and frequency agility offer the promise of defense against high -maneuverability,low -flying supersonic missiles. A range of potential laser engagement mission areas and capabilities is summarized.