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DVL A125

About

About DVL A125

DVL A125 is Water Linked’s compact Doppler velocity log for underwater vehicle navigation. Its four-beam, 420 kHz Janus array measures bottom-relative velocity at altitudes from 0.05 to 125 metres, maintaining bottom lock at speeds up to nine metres per second. The 125-millimetre-diameter sensor weighs 750 grams in air and is offered with 1,000-metre or 4,000-metre depth ratings.

Ethernet and a serial interface carry velocity measurements to ROV, AUV and other marine control systems. An embedded computer, integrated AHRS/IMU and web interface support installation, configuration and diagnostics. The sensor takes a 10–30-volt DC supply and consumes four watts on average. Standard and Performance versions provide different accuracy levels. DVL A125 supplies velocity data to a navigation filter; it does not independently provide a complete positioning or autonomy system.

30 AUG 2026

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Observed use

Exact-product configurations are shown without inferring supply, purchase, customer status, standard fit, deployment or partnership.

  • Observed configuration

    Evaluation - Tested With - Physical - Greensea IQ, Water Linked and VideoRay tested IQNS navigation with a DVL A125 on a VideoRay Defender ROV.

    Source

Resources

Curated durable documents and official technical references.

Timeline

  • Greensea IQ and Water Linked test autonomous ROV navigation

    2024-11-25 - Demonstration - Greensea IQ completed field testing of its IQNS edge-processing and navigation system on a VideoRay Defender ROV. For the demonstration, IQNS was integrated with Water Linked’s extended-range DVL A125 to create a stand-alone underwater navigation solution. Trials under a U.S. Navy and Defense Innovation Unit contract reported improved long-distance navigation, target search and underwater mapping, with added auto-calibration and gyro-only modes.

    Source

Context

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