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The Ship Protection System (SPS) is a ship-based underwater threat detection system manufactured by FarSounder, Inc. Based on FarSounder's 3D forward looking sonar, their SPS offers 360° coverage of underwater threats to vessels at anchor or at dock. This is a commercial product suitable for mega yachts.
Examples of diver-detecting active sonar systems are: AN/WQX-2 – Diver detection sonar used in defense against underwater incursions; Cerberus (sonar) – Diver detection device; Underwater Port Security System – Defense against hostile swimmer incursions; Trained animals Trained dolphins and sea lions can find submerged divers.
Diver detection sonar (DDS) systems are sonar and acoustic location systems employed underwater for the detection of divers and submerged swimmer delivery vehicles (SDVs). The purpose of this type of sonar system is to provide detection, tracking and classification information on underwater threats that could endanger property and lives.
U.S. Navy sailors guiding a Cerberus Mod 1 Swimmer Detection System into the water at Naval Station Pascagoula. Cerberus is an ultrasound diver detection sonar to detect submerged divers. Mod 1 was made by Qinetiq, in their underwater business division. It was unveiled at UDT 2003. The underwater division was sold to ATLAS ELEKTRONIK UK in 2009 ...
Active systems are often using a wearable on the swimmer, such as a wristband, that monitors the behaviour and position of the swimmer. If the swimmer is detected to be under water för a certain period, an alarm is triggered and through acoustic underwater communication from the wristband to receivers installed in the pool the alarm is transferred to on-site lifeguards that immediately can ...
Sonar systems are generally used underwater for range finding and detection. Active sonar emits an acoustic signal, or pulse of sound, into the water. The sound bounces off the target object and returns an echo to the sonar transducer. Unlike active sonar, passive sonar does not emit its own signal, which is an advantage for military vessels.