Compass drift is a common issue where the compass reading gradually shifts over time due to environmental factors or mechanical issues. In India, compass repair technicians can detect and correct drift through calibration and deviation surveys. Regular checks are recommended to ensure the compass remains accurate and compliant with maritime regulations.
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Compass error detection is crucial to ensure that your magnetic compass provides accurate readings. In India, professional service providers offer error detection using deviation surveys and magnetic tests. Technicians use tools like the transit bearing method to identify errors and suggest correction methods, which are required by DG Shipping regulations.
Deviation charts document compass errors caused by magnetic influences on board. Marine technicians in India offer deviation survey services, create deviation cards, and adjust corrector magnets to minimize error. This is mandatory during surveys and after compass installation or repair.
Chennai, a leading port city on India’s east coast, has authorized compass calibration centers for vessels. These services are carried out by certified adjusters using azimuth or sun compass methods. A deviation card is issued post-calibration, in line with DG Shipping and SOLAS rules.
A compass deviation survey determines the amount of magnetic deviation in a compass under shipboard conditions. Conducted by qualified compass adjusters, the survey includes multiple heading checks and is often followed by a deviation card. In India, these surveys are done before sea trials or after structural modifications to a vessel.