The Garmin MSC10 is a very expensive gps system that can substitute for a 9 axis heading sensor. But you would save money if you got an autopilot bundle that includes it. If you plan on getting autopilot, get this. These are also necessary for an autopilot. Your radar would be able to track MARPA targets. The Garmin 9axis Heading Sensor provides heading, Rate of turn, and roll & pitch(trim & heel). But, your new Fantom radar would also not be able to track MARPA targets because also needs your rate of turn in order to calculate target course and speed. The Garmin GPS24 is their newest N2k gps with a steadycast built in for magnetic heading. They can be mounted anywhere but must be away from magnets or ferrous metals. Your radar would also not be able to track MARPA targets. They provide only heading to the NMEA2k bus. It can't overlay your chartplotter.Īt a minimum you need a Steadycast heading sensor. It is not accurate enough at all speeds to ensure your radar is displaying the true heading. It cannot be accurate if you are not moving. Click to expand.A typical GPS calculates heading(based on course over ground) based on movement.
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