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.
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.
Read more about Acoustic Release: Method of Operation, History and Use, The Release Mechanism, Project-specific Selection Criteria
Famous quotes containing the word release:
“If I were to be taken hostage, I would not plead for release nor would I want my government to be blackmailed. I think certain government officials, industrialists and celebrated persons should make it clear they are prepared to be sacrificed if taken hostage. If that were done, what gain would there be for terrorists in taking hostages?”
—Margaret Mead (1901–1978)