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

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

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

Relating to or using nuclear energy, typically fission, for propulsion or power generation in military vessels.

A system of hydrophones towed behind a vessel to detect submarines and torpedoes, minimizing interference from the ship's self-noise.