Ship speed log JLN-900

digitalDoppler

Full compliance with IMO MSC.334（90）using a single device Enables measurement of ship speeds over ground up to depths of 250 m Three axis* SOG and one axis STW Correlation technology Compact, lightweight gate valve included as standard * Requires gyro signal input Acoustic Correlation The correlation system eliminates the effects of water temperature and salt concentration for more accurate and stable measurements. This enables high-accuracy measurements of ship speeds through water and over ground during pier docking and undocking. Ultrasonic waves are emitted simultaneously in the vertical direction from multiple transducers, and the correlation of these waves is used to measure the ship speed. 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 Exceeding 50,000 GT ＊ MSC 334（90） effective from 1 July 2014 In the installation requirements*, it is stated that separate speed and distance measuring devices must be fitted on ships of 50,000 GT and over for measuring the speed and distance through the water and over the ground. The JLN-900 is designed so that the system for measuring the speed and distance through the water is completely separated from the system for measuring the speed and distance over the ground. For this reason, major classification societies have recognized compliance with this requirement using only this speed log. The JLN-900 enables satisfying of the installation requirements with a minimum of equipment and costs．