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

Combined diesel-electric and gas propulsion system integrating diesel engines for cruising and gas turbines for high-speed operation.

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.

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