Anti-Submarine Warfare. Capability to detect, track, and engage submarines.

Type of internal combustion engine fuel, refined from crude oil.

Military action involving the use of electromagnetic spectrum to disrupt, deceive, or destroy enemy electronic systems.

The upper deck of an aircraft carrier, equipped for aircraft takeoff, landing, and maintenance operations.

Sonar system installed on the hull of a ship, used for underwater detection and navigation by emitting and receiving sound waves.