An Electromagnetic Log, sometimes called an “EM Log”, measures the speed of a vessel through water.
It operates on the principle that:
The Doppler system can be connected with other electronic navigation systems providing generally accurate speed input. The navigator should be cautioned, that precise speed should be determined not only by using the Doppler but also from careful calculations of distances be¬tween accurate navigational fixes.
|CONSILIUM SAL SD4-3||FURUNO DS-80||JRC JLN-205|
|NINGLU SL-806||SPERRY NAVIKNOT-III||TOKIMEC TD-310|
|TOKIMEC TD-501||YOKOGAWA EML-201||YOKOGAWA EML-500|