Determining compass deviation.

Determining compass deviation is necessary to be done periodically, at certain time and in certain situations and drawing the diagram of Deviation curve. (more…)

Gyro-compass Speed Error.

Gyro-Compass Speed Error: an error of the gyro-compass; the gyroscope axis deviation from to the true north direction. (more…)

Magnetic Compass Deviation.

This article is similar to the previous post, but refer to compass bearings.

The Magnetic Compass Deviation is the angular deviation of a compass card, to right or left of the magnetic meridian, determined by the influence of magnetism of the ship or cargo; (more…)

Magnetic Compass Deviation.

The Magnetic Compass Deviation is the angular deviation of a compass card, to right or left of the magnetic meridian, determined by the influence of magnetism of the ship or cargo; (more…)

Magnetic Variation or Declination.

Magnetic Variation or Declination is the horizontal angle formed between the geographic meridian and magnetic meridian. (more…)