Designed to work with Transition Zone and Ocean Bottom Cable and seismic techniques, Sonardyne’s acoustic positioning system significantly improves the speed, accuracy and efficiency of positioning seabed marine seismic cables. The system uses a network of low cost, rugged transponders that can withstand fast deployment through mechanical ‘squirters’ to provide users with an efficient method of collecting the positions of thousands of seabed hydrophones in real-time and in water depths from 1 to 500 metres.

A typical system comprises of acoustic positioning transponders attached to the seismic cable, a vessel-based acoustic transceiver interfaced to a client’s PC running the Sonardyne HydroPos software application. Third party software applications which incorporate an acoustic control module can also be used with the system.

Prior to deployment from a cable lay boat, transponders are attached to the seismic cable at each ground station to be positioned. Once the cable is laid, the system precisely measures the acoustic range (distance) from a surface transceiver on the pinging vessel to each transponder to enable its exact position to be established. The positioning process is more accurate than traditional first break techniques, 1-2 metres absolute, and can either be conducted once the cable is laid or later whilst shooting.