OVERVIEW: Towed Array Sonars have been widely used since the 1960s towed behind surface ships or submarines for long-range underwater acoustic detection and tracking of submarines and surface vessels.

GENERAL DESCRIPTION: A Passive-only Towed Array Sonar consists of a long, thin line of hydrophones deployed behind a vessel to detect and localize underwater acoustic sources without emitting active signals. By using the array’s length and signal processing, it provides enhanced directional sensitivity and low-frequency detection capabilities, allowing for detection at extended ranges and improved target classification. Typically used on naval surface ships and submarines, it enhances situational awareness in antisubmarine warfare (ASW).

ROLE SUMMARY:
Category: Passive Sonar / ASW Sensor
Primary Use: Long-range underwater acoustic detection and tracking
Function: Passive signal collection and bearing determination
Platform: Surface ships and submarines
Integration: Linked with onboard combat systems and ASW fire control

See Specific information under [Sensors/EW] and [Properties] sections.

SOURCE:
Jane’s Underwater Warfare Systems
Naval ASW Doctrine Manuals