[TG] EV-1 Dilemma

[Tom - Raymarine - Moderator]

Hello Mark,

The EV sensor cores aren't affected by pitch and roll in the same way as the old fluxgate technology because they can measure magnetic field in all 3 axes, as opposed to a 2D fluxgate that only works when it's level and therefore needs to be gimballed. Being in a magnetically-stable environment is much more important than being central nowadays.

I'd suggest taking a smartphone with magnetometer app close to the location of the EV1 and measuring the magnetic field when the motors are starting/running and then stopped, and see what changes. If the effect is anything much (and particularly if the phone's heading reading deflects when engine is started/stopped) then you need to move the EV.

After moving the EV, if you do, I would do Compass Restart through the calibration menu in order to wipe old, irrelevent calibration data, and see how you go from there. If you're still not sure of the results, maybe post some video of the indicated heading data on the pilot display so we can see what's going on.

Regards,
Tom