Doppler speed logs

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boat speed log
boat speed log
DS99 series

DS99 is a single axis Doppler Speed Log, displaying ship’s speed relative to water in one axis(STW, Fore/ Aft) and distance (Trip/ Total) in 7 inch TFT LCD, using Doppler ...

ship speed log
ship speed log
JLN-900

... This eliminates the variations due to the propagation speed of the ultrasonic waves and changes in their angles. One Speed Log for Compliance with Installation Requirement for Ships ...

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JRC USA
ship speed log
ship speed log
JLN-740

Highly accurate speed and distance log for high-mileage trips. IMO MSC.96(72)-compliant Doppler Speed Log; compatible with ships above 300 GT. Measures ...

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JRC USA
ship speed log
ship speed log
TD-310

TOKYO KEIKI DOPPLER SPEED LOG TD-310 A high-accuracy Log complying with the requirements of IMO. Many signal output functions as standard and Easy installation. TD-310 The ...

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How to choose this product
doppler-speed-log

The Doppler speed log measures a vessel's speed through the water or over the seabed. NauticExpo offers dual-axis Doppler logs for ships and three-axis models for submarines.

Applications

A Doppler speed log can be installed on any type of ship. Large ships can have both bow and stern units, yielding more precise readings of vessel movement, especially useful when docking or anchoring.

Technologies

As its name indicates, this instrument uses the Doppler effect to calculate a ship's speed. Dual-axis models give both lateral and fore-and-aft readings. Three-axis systems are used aboard submarines to give vertical speed, as well. The log consists of one or more transducers mounted on the hull and linked to a display screen on the bridge.