A 300-meter depth rating system with no need to calibrate crystal oscillators or manually sync the distance between units (select auto sync) at mission start-up, you can get up and running in no time.
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ROVL Mk III version
A 300-meter depth rating system with no timebase drift allows the system to remain submerged indefinitely without losing slant range accuracy. Using the interrogate/response model of a traditional USBL system, it dispenses with both distance sync at the start of the mission and period crystal calibration procedures.