ACU 100/EV1 Autopilot Deviation

[Steve - Raymarine - Moderator]

You are talking about two different things. The stated Variation for your location is 8 degrees. That is an understanding of the magnetic variance of your area from magnetic north. The Deviation reported by the autopilot EV-1, is a maximum deviation from ferrous metal or electronic interference around the EV-1 from the complete compass rose, the direction of the interference is not reported when the Deviation is calculated.

That only way to lower the Deviation is to relocate the EV-1 sensor, keeping in mind the location or any ferrous metal or electronic equipment and moving the EV-1 as far away as possible.