Page 19: of Marine Technology Magazine (June 2019)

Hydrographic Survey: Single & Multibeam Sonar

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In addition to hydrophones, the company designs and manu- factures electrodynamic sound projectors and has recently in- troduced its C-BASS family of very-low-frequency projectors.

These are less expensive and smaller, lighter and designed to be more ef? cient than standard products. With their broad bandwidth, they can be used in a variety of applications where sound projectors could not previously be employed. The C-

BASS systems may be used omni-directionally or in arrays to produce high-power sources with or without directivity and applications include their use as diver deterrents to protect marine assets; as VLF ASW systems; as a VLF calibration source; in AUV-based target emulation; for underwater navi- gation/GPS applications by providing a network of beacons; for acoustic and health monitoring purposes; and in VLF com- munication systems with a range exceeding 1,000 km.

A GeoSpectrum Technologies C-BASS VLF sound projector undergoing underwater testing in a land-based test tank.

Photo: GeoSpectrum Technologies.


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