DVL 1000

DVL 1000 provides underwater motion estimates by transmitting sound along a four-beam Janus geometry and measuring Doppler shift in the returns. Bottom tracking constrains drift in an inertial-navigation solution, while water tracking offers a fallback reference after the seabed moves outside the usable acoustic window. Optional current profiles let one instrument contribute both vehicle-navigation and environmental measurements during a mission.

This one-megahertz model is available in a 300-metre pressure housing and can maintain bottom lock between 0.1 and 75 metres under stated conditions. Maximum update rate is eight hertz, and profiling range reaches 30 metres. The 1.7-kilogram instrument draws about 1.3 watts in Nortek's one-hertz test. Interface choice, altitude, boundary material, bubbles and suspended matter affect data quality; export-controlled and licence-free configurations also carry different accuracy limits.