Understanding compass calibration requirements under Transport Canada regulations for safe navigation.
Canadian regulation mandates specific requirements for compass calibration and navigation equipment certification to ensure vessel safety.
5.1.1 A magnetic compass is an instrument designed to seek a certain direction in azimuth and to hold that direction permanently, and which depends, for its directional properties, upon the magnetism of the earth.
5.1.2 The standard compass is a magnetic compass used for navigation, mounted in a suitable binnacle containing the required correcting devices and equipped with a suitable azimuth reading device.
5.1.3 The steering compass is a magnetic compass used for steering purposes mounted in a suitable binnacle containing the required correcting devices.
5.2.1 The compass card shall be graduated in 360 single degrees. A numerical indication shall be provided every ten degrees, starting from North (000°) clockwise to 360°. The cardinal points shall be indicated by the capital letters N, E, S and W.
5.2.2 The directional error of the card, composed of inaccuracies in graduation, eccentricity of the card on its pivot and inaccuracy of orientation of the card on the magnetic system shall not exceed 0.5° on any heading.
5.2.3 The card of the steering compass shall clearly be readable both in daylight and artificial light at a distance of 1.4 m. The use of a magnifying glass is permitted.
Source: Transport Canada Publication TP 3668E - Navigation Safety
106 (1) Every vessel, except the following vessels, must be equipped with a magnetic standard compass that is independent of any power source and that enables the vessel's heading to be determined and displayed at the main steering position:
Exception — vessels with gross tonnage less than 150
(2) Despite subsection (1), a vessel with gross tonnage less than 150 may be equipped with the following equipment:
Exception — vessels with gross tonnage 150 to 500
(3) Despite subsection (1), a vessel with gross tonnage of 150 or more but less than 500 may be equipped with the following equipment:
(4) Compensation: The magnetic compass must be properly compensated and its table or curve of residual deviations must be accessible on board the vessel near the compass.
(5) Correction means: Vessels equipped with a magnetic compass, except pleasure craft with gross tonnage less than 150, must be equipped with means to make corrections at all times to obtain true heading and bearing.
Source: Navigation Safety Regulations (2020), SOR/2020-216
Download official Transport Canada regulations and compliance documentation.
International standard for magnetic compasses, binnacles and azimuth reading devices for ships and marine structures.
Download PDF (489 KB)Transport Canada publication on navigation safety requirements and compass regulations for Canadian vessels.
Download PDF (247KB)Complete official regulations from Justice Canada including Article 106 compass requirements and full legal framework.
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