Reading a ship’s magnetic compass involves aligning the lubber line with the ship’s heading and interpreting the direction on the compass card. Mariners must correct readings for deviation and variation to determine the true course. Clear knowledge of cardinal and inter-cardinal points is essential.
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The cost of replacing a marine magnetic compass in India depends on brand, approval type (DG Shipping/IMO), and size. Entry-level fishing boat models cost less, while certified compasses for SOLAS ships can be more expensive. Most suppliers include mounting, deviation survey, and documentation.
Compass refilling involves replacing aged or leaked damping fluid to restore compass functionality. Marine workshops in India offer fluid refill services using OEM-approved liquid for brands like Saura, Ritchie, and C-Plath. This service also includes leak testing and dome resealing.
Magnetic compass testing involves checking fluid levels, dome clarity, magnet alignment, and deviation. A qualified technician inspects the compass aboard ship or in workshop conditions, then performs a deviation swing. A deviation card is issued post-testing, as per DG Shipping rules.
Marine magnetic compasses come in different types including binnacle-mounted, bracket-mounted, flush-mounted, and overhead types. Models also differ by application—deep-sea vessels vs. fishing boats. Features such as gimbals, lighting, and deviation correction vary by type. Understanding each helps in selecting the right one.
Marine vessels in India require reliable and approved magnetic compasses for navigation. Whether it’s a cargo ship, tugboat, fishing vessel, or inland barge, selecting the right type based on compliance, size, and mounting option is essential. Indian suppliers provide both domestic and imported compasses with service support.
IMO-compliant magnetic compasses are built to meet international standards for marine navigation. They include features such as anti-glare lighting, deviation correction, and gimballed suspension. These compasses are required on SOLAS vessels and must be maintained regularly by certified technicians.
Magnetic compasses supplied with certification ensure compliance with class, IMO, and DG Shipping requirements. These compasses are tested for accuracy, material quality, and environmental endurance. Certification also helps with surveys and onboard audits. Leading brands provide traceable documentation for every unit.
Compass repair and overhaul services in India cover mechanical repairs, dome replacement, fluid refill, and gimbal adjustment. Carried out by trained technicians, these services extend the life of marine compasses and help maintain navigational accuracy. Certificates and service reports are usually issued post-repair.
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.