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.
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Compass adjustment services involve the correction of magnetic deviation using soft iron correctors and magnets. Certified compass adjusters perform these adjustments on board to reduce compass error. In India, these services are available at ports like Mumbai, Chennai, and Kochi. A deviation card is usually issued after adjustment, aiding navigators with accurate headings.
A compass calibration certificate is an official document issued after a successful compass calibration. It includes the deviation values, correction angles, and technician credentials. In India, authorized compass adjusters provide this certification, which is often required during flag state and port inspections. Valid certificates enhance compliance with SOLAS and IMO requirements.