Patent ID: 8526270

Claim:
An acoustic transmitting method, comprising: deploying an acoustic transmitter device, capable of transmitting and recording a plurality of acoustic signals, from a marine-vessel, wherein said acoustic transmitter device is deployed underwater at a predetermined distance from said marine-vessel and is contained in an expendable package; providing at least one predefined standard acoustic signal for underwater acoustic energy transmission by said acoustic transmitter device; providing a periodic acoustic signal pulse with encoded information for underwater acoustic energy transmission by said acoustic transmitter device; transmitting said at least one predefined standard acoustic signal to ensonify at least one acoustic receiver joined to said marine-vessel, wherein said at least one predefined standard acoustic signal is transmitted from a predefined depth at a specified start time for a specified period of time; changing the depth of the acoustic transmitter device during a transmit operation at a selectable rate; recording a plurality of acoustic signal data, including acoustic signal data projected by said marine-vessel, by means of said acoustic transmitter device; and controlling said acoustic transmitter device by a remote controlled trigger signal and alternately by a plurality of preset conditions.