Hydro-Acoustic Warning System Safe and Sound Waterfront Reliable Detection of Hostile Objects Underwater for Early Warning and Sabotage Prevention. ► Detection, tracking and classification of underwater objects; ► Active echo sounding; ► 500 m guaranteed detection range. Underwater hydroacoustic detection of objects on the water surface or underwater is a vital element for integrated security system. TALISMAN-3 precisely detects moving underwater objects and unauthorized frogmen within 500...