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

A type of internal combustion engine that generates power using a turbine driven by gas expansion.

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

Radar system using multiple small antennas whose signals are combined to create a steerable beam without physical movement, enabling rapid scanning and tracking of multiple targets.

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