Determining the ship’s speed using the log speed.

For electro-mechanical and impeller-type logs, the Log Correction (or Log Coefficient) does not vary with vessel speed. The Log Speed turns into True Speed using the Log Correction (or Log Coefficient). Just as for the distance correction. (more…)

Measured Distance.

The Measured Distance: The distance between the crossing leading lines of an Experimental Range. (more…)

Experimental Range.

The Experimental Range: Is a maritime area near and parallel to the coast, arranged for carrying out various trials with the ships, such as: (more…)

The log in a region with marine currents.

To determining the Log Correction or Coefficient in a region with marine currents, proceed as follow: (more…)

The Log Coefficient. Determining the travelled distance.

The log coefficient: The ratio between the True Distance travelled by ship and the Log Distance indicated by the log. (more…)