Quote Originally Posted by Alphahawk View Post
That unit that comes with a Spot Lock motor is not a heading sensor. It is a compass. It is required to use the jog feature on those motors…it in no way helps with Spot Lock. A stand alone heading sensor will always show the direction of the boat even sitting still. On Humminbird sonars unless the boat is traveling I think at or over .5 mph you will get a circle. If above .5 mph you get a a boat icon pointing in the direction you are headed. A stand alone heading sensor will give you a direction indicator all the time.

Regards


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My terrova has the heading sensor that came with the unit and it does work with the spot lock feature and Jog. It is also a compass it uses as well. When I'm at the bow I have boat heading and also shows where the trolling motor is pointing on my map. When I am in motion I also get course over ground so I have a total of three lines on my unit. Given mind I also have link so I'm sure things may be different with trolling motors without that feature. I have tested the compass by putting a magnet around the heading sensor when spot locked and it will cause the trolling motor to do all sorts of crazy things. I also have an external GPS heading sensor over my transducer at the stern. The only way I can use the external GPS for heading is to have my terrova powered off otherwise you lose the heading line unless the trolling motor is placed in the water although you maintain course over ground as long as you're moving with outboard power. With the link system it does not matter which GPS Source you have selected, the terrova always takes priority as long as it's powered on. I may have gotten completely off topic but just stating what I have noticed with mine

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