First Honeywell Hydrostar Plus System Sold To Navy

Honeywell's offshore business has sold its first HydroStar Plus subsea tracking and relocation system to the Naval Ocean Systems Center (NOSC) in Hawaii after a successful performance demonstration in customer- funded sea trials.

Testing was conducted onboard a 48-foot vessel using a gimballed hydrophone mount. The system's capability was tested at pinger separations of 2, 3, 5 and 8 feet, with a 200-foot vertical separation.

The hydrophone, housed in a 5- inch-diameter case, integrates both the pitch-and-roll sensor and power amplifier. The newly added transponder mode allows HydroStar Plus to use slant-range measurements to accurately track subsea objects and remote-operated vehicles at large horizontal offsets from the surface vessel.

The hydrophone is calibrated at Honeywell's new test tank facility near Everett. The facility provides consistent environmental conditions and precise calibration alignment.

The calibration process, coupled with Honeywell's patented self-calibrating phase-measurement process, made it possible for Honeywell to achieve the .5 percent accuracies during the NOSC sea trials.

An ultra-short baseline acoustic system, HydroStar Plus uses a single subsea beacon and a single multielement shipboard hydrophone to provide range, bearing and depth information of subsea positions.

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Maritime Reporter Magazine, page 39,  Dec 1986 West Coast

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