Magnetic Compass Adjuster

Magnetic Compass AdjusterPurpose

The Magnetic Compass Adjuster course is conducted by experienced faculty who has been doing adjustment out at sea. After going through the course, candidates gain enough confidence to carry out adjustments in ship’s magnetic compass to eliminate / reduce compass error due to ship’s induced magnetism (deviation). The course also covers magnetic compass repairs in detail.

As per OCIMF guidelines, compass developing more than 3 degrees deviation from the last recorded deviation curve should be re-adjusted, hence a finding in vetting inspection. Also a deviation more than 5 degrees on any heading needs to be readjusted. Ship managers spend a lot of money to hire a compass adjuster to do adjustment to magnetic compass to close the SIRE finding.  Magnetic Compass Adjuster course enables ship’s officer to carry out the adjustment themselves and keep compass calibrated to avoid SIRE findings.

According to AMSA, failure to maintain a magnetic compass in a good working order or to monitor deviations may result in a vessel being delayed or detained, and the vessel owner and/or Master can potentially be prosecuted.

SOLAS Chapter V - Annex 13 - Magnetic Compasses

Responsibility for Maintenance
5.) The Owner and the Master are responsible for ensuring that compasses on their ships are maintained in good working order.

Adjustment of Compasses
6.) Each magnetic compass required to be carried by the Regulations shall be properly adjusted and its table or curve of residual deviations available at all times. Magnetic compasses should be adjusted when:
a.) they are first installed;
b.) they become unreliable;
c.) the ship undergoes structural repairs or alterations that could affect its permanent and induced magnetism;
d.) electrical or magnetic equipment close to the compass is added, removed or altered;
e.) a period of two years has elapsed since the last adjustment and a record of compass deviations has not been maintained, or the recorded deviations are excessive or when the compass shows physical defects.

Effects of Changes in Magnetism During the Life of a Ship
7.) Because the magnetism of a new ship can be particularly unstable, the performance of magnetic compasses should be monitored carefully during the early life of a ship, and adjustments made if necessary.
8.) Masters are advised that it is essential to check the performance of magnetic compasses particularly after:
a.) carrying cargoes which have magnetic properties;
b.) using electromagnetic lifting appliances to load or discharge;
c.) a casualty in which the ship has been subject to severe contact or electrical charges;
d.) the ship has been laid up or has been lying idle even a short period of idleness can lead to serious deviations, especially for small vessels.

Target Audience 

This course is for ship's Master and navigational officers. However Electronic Navigational Aid service technicians are also welcome to learn the tricks of Magnetic Compass Adjustment.

Course Content magnetic compass adjuster

Day : 1 (Theory)

  • Introduction including legal aspects and requirements
  • Principle of compass adjustment
  • Obtaining Magnetic Variation of a place
  • Magnetic effects of electrical currents
  • Ships magnetism
  • Effects of permanent and induced magnetism
  • Compass design - general principles
  • Compass compensations
  • Use of Gauss meter in adjusting Heeling magnets
  • Magnetic effects of Northern and Southern Hemisphere on Heeling correctors
  • Coefficiant A,B.C,D and E
  • The various types of transmitting magnetic compass bowls and repeaters
  • Compass Repairs and Compass liquid characterstics
  • Removing the bubble in compass
  • Methods of detecting mechanical errors in compasses at sea
  • Assessment of safe distances of navigational and other equipment of the Compass

Coeficient B
Coefficient B

Coefficient C
Coefficient C







Day: 2 (Practical)

  • Practical Compass adjustment and making deviation card

Magnetic Compass Adjuster

CourseFee INRDurationCourse TimingDate CommenceRemarks

2 days 10:00-18:00On Demand

Some of our Esteemed Clients for the course have been: