The heading sensor has nothing to do with i pilot. It just tells the tm which direction is the front of your boat. You can put it in a rod locker so long as the arrow is pointing towards the front. It is only used by the tm for the jog feature while on spot lock so if your not using a remote or your h bird screen to jog you dont even need to install it.
Just run it off something that only has power when your master power is switched on, no separate switching needed.
If its iPilot LINK, both the iPilot GPS and Heading Sensor can the used with a display for both functions=same as the Humminbird AS GPS HS.
Wayne Purdum
Charlottesville, Va.
Helix 12 MEGA SI+ G4N, Helix 15 MEGA SI+ GPS G4N
SOLIX 12 SI/G3, Helix 8 MEGA SI+ G4N, Ultrex 80/Advanced, MEGA360,
MEGA LIVE, LIVE TL, MEGA LIVE 2, Xplore 10