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:
“The steel decks rock with the lightning shock, and shake with the
great recoil,
And the sea grows red with the blood of the dead and reaches for his spoil—
But not till the foe has gone below or turns his prow and runs,
Shall the voice of peace bring sweet release to the men behind the
guns!”
—John Jerome Rooney (1866–1934)