An acoustic release is an oceanographic device for the deployment and subsequent recovery of instrumentation from the sea floor, in which the recovery is triggered remotely by an acoustic command signal.[1]
A typical release consists of the hydrophone (see dark gray cap in the figure), the battery housing (long gray cylinder), and a (red) hook which is opened to release the anchor by high-torque electrical motor.
- ^ University of Rhode Island http://www.dosits.org/gallery/tech/bt/ar1.htm Archived 2009-02-23 at the Wayback Machine