NORTEK DVL 333

Bottom-track from 0.1 to 375 m range; 300 m operational depth

Single ping std @ 1.5 m/s 0.8 cm/s at 1/2 max altitude
Long-term accuracy (Following standard calibration) ±0.1% / ±0.1 cm/s (export-controlled), >1% (license-free) procedures
Minimum altitude 0.1 m
Maximum altitude 375 m (Bottom-track distance dependent upon bottom type)
Velocity resolution Better than 0.01 mm/s
Maximum ping rate (3) 8 Hz