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Message: <blockquote data-quote="KevinWI" data-source="post: 509146" data-attributes="member: 7422"><p>Mine is about a foot away....works fantastic and very accurate...the heading sensor uses bluetooth. It does not need line of sight to work although the closer the better as bluetooth is weaker than wifi.  Spot-lock is awesome...but that has nothing to do with heading sensor....though you do have to calibrate with two full circles.  All the heading sensor does it tell the unit which direction the boat is pointed...which is why it's important to mount the sensor with the arrow pointing as perfectly parallel to the boat as possible. With I-pilot you can set a heading and it will not deviate even with wind or current. It's awesome.</p></blockquote><p></p>