DOPPLER LOG/SPEED LOG

DOPPLER LOG/SPEED LOG

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