Acoustic releases can be used as recoverable reference markers for positioning systems such as Easytrak and other USBL systems. They also allow the recovery of subsea instruments such as current meters, and can send back information such as tilt status and battery condition. With low power consumption, acoustic release beacons are typically designed for long-life operations.
As with other beacons from applied acoustics, the acoustic release beacon can receive and transmit signals to a surface instrument. When the equipment is ready to be retrieved, the surface transmitter will send acoustic signals through the water to locate it and a specific command to release, and it will let go of the anchor. The anchor weight remains on the seabed while the equipment and release transponder float to the surface.
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