The log in a region with marine currents.
To determining the Log Correction or Coefficient in a region with marine currents, proceed as follow:
· The ship takes a course parallel to the marine current direction;
· The vessel executes 4 passes, on the same distance (2 in one direction and 2 in the opposite direction);
· On every passage is measured the distance displayed by the log;
· Determine the average of four distances indicated by the log.
To keep the original meaning of motion of the ship may be waived to 4th passing, hence LD₂ = LD₄
It is not necessary to know the current velocity to determine the Log Correction or Log Coefficient.
All other comments are the same as in previous articles.
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