Passive acoustic detection of a rebreather using a random array

Divers, including closed circuit (rebreather) divers constitute a potential threat to waterside infrastructures. Active diver detection sonars are available commercially but present some shortcomings, particularly in highly reverberant environments. This has led to research on passive sonar for diver detection. Passive detection of open-circuit...

Passive diver detection in warm waters

Passive diver detection relies on the detection of sounds emitted by underwater breathing apparatus. It is limited by the ambient noise. Passive detection and localization of scuba divers in a port environment up to 400 m has been reported. The applicability of these methods to warm waters has not been demonstrated yet. Indeed, warm waters are...

Passive diver detection and localization using hydrophones suspended under a boom

A boom is a line of floats that constitutes a physical barrier for providing abovewater stopping power. However, it does not provide any situation awareness. In order to overcome this shortcoming, an integrated “booms and sensors” solution using passive sonar was conceived and tested experimentally by suspending hydrophones under a boom. The...