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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For fishing boats, affordable magnetic compasses are available in compact sizes with reliable accuracy. These compasses may not carry full IMO approval but can meet BIS or local safety standards. Available from marine stores in coastal states, they are easy to install and ideal for short voyages.
Magnetic compass installation in India is offered by certified marine technicians and service companies. The service includes proper alignment, binnacle mounting, and deviation adjustment. Installations follow DG Shipping and SOLAS guidelines. Calibration and issuance of deviation cards are usually bundled in the service.
Choosing the best magnetic compass for ships in India depends on vessel type, approval requirements, and usage conditions. Trusted brands like Saura, Cassens & Plath, Ritchie, and C-Plath offer IMO and DG Shipping-certified models. Look for features like gimballed mount, night illumination, and low deviation. Indian suppliers offer support for installation and service.
Compass calibration must follow procedures defined by DG Shipping, IMO, and SOLAS. It involves checking for deviation, adjusting magnets, and issuing a deviation card. Calibrations should be done by certified compass adjusters and recorded in the ship’s log. Rules also require recalibration after structural changes or magnetic interference. Proper documentation is essential during audits.
Class societies like IRS, DNV, ABS, and Lloyd’s Register certify magnetic compasses based on accuracy, materials, durability, and construction. Certification ensures the compass is seaworthy and compliant with SOLAS and IMO rules. It also helps meet insurance and survey requirements. Certified compasses bear engraved plates with type approval information.
Under the SOLAS (Safety of Life at Sea) convention, ships are required to have at least one magnetic compass and one spare. These compasses must be correctly installed, fully functional, and maintained. They must also have proper deviation cards and be readable from the helm. SOLAS further mandates compass repeaters for vessels over certain tonnage. […]
Commercial vessels such as cargo ships, tankers, and offshore platforms use high-precision magnetic compasses housed in binnacles with repeaters and calibration tools. Indian marine suppliers offer IMO-approved compasses with optional deviation cards and correction services. These are essential for global navigation, backup, and emergency systems.
A compass servicing company in India specializes in magnetic compass repair, calibration, and adjustment. These companies cater to shipowners, ports, and surveyors, offering on-site and in-house services. They are staffed with trained technicians and equipped with precision tools to issue valid deviation reports and certificates.
A magnetic compass overhaul involves complete disassembly, cleaning, fluid replacement, magnet check, dome sealing, and recalibration. It restores the compass to like-new condition. Overhauls are recommended every 3–5 years, especially on older vessels. Indian marine workshops offer overhaul services with optional compass certification for class approval.