Showing 1–30 of 56 results
Marine Magnetic Compasses & Digital Heading Sensors
Maintain an infallible primary navigation reference that never fails when electrical power goes dark with marine magnetic compasses from Edric Marine. Featuring precision damping and sapphire jewel movements from Ritchie Navigation, our compasses are trusted by the US Coast Guard, commercial mariners, and offshore fishermen.
Available in flush-mount, bracket-mount, and binnacle installations with built-in 12V night illumination and compensator magnets, each compass is calibrated for extreme tilt angles and high-speed hull vibration.
Frequently Asked Questions
Why do I still need a magnetic compass if I have GPS chartplotters?
Maritime safety authorities require a magnetic compass on all vessels. GPS chartplotters can lose satellite lock or fail during electrical shorts, while a magnetic compass operates 100% mechanically without power.
How do I calibrate and remove deviation from a marine compass?
Run the boat along known navigation ranges or compare against GPS COG in calm current-free water on North, South, East, and West headings, turning the brass compensator screws to eliminate heading error.
What causes an air bubble in a marine compass dome?
Small bubbles form when thermal expansion causes fluid contraction in extreme cold or if the diaphragm seal has developed a leak. Ritchie compasses can be topped off with odorless mineral spirits or factory serviced.
How far should a magnetic compass be mounted from electronics?
Maintain at least 18 to 24 inches of clearance from VHF speakers, stereo amplifiers, electric windshield wiper motors, and multi-conductor power cables to avoid severe magnetic deviation.