What are these lines?

[Chuck - Raymarine - Moderator]

Welcome to the Raymarine Forum Vettepro,

The COG vector is denoted by a green line and the Heading vector is denoted by a red line. The Evolution autopilot system does not have a specific Seatrial calibration, you are to do the Dockside Wizard, then take the boat out for a 15-20 minute cruise, doing a few circles and figure 8's to show the system all the points on the compass rose, keeping the speed between 3-15 knots. While out on the water, press Menu>Setup>Diagnostics>About Pilot, scroll to the very bottom of the page to look at the Deviation. If it is within 15 degrees, you are done. If not, then you should seek and alternate location for the EV-1 Sensor Core. Heading adjustment may then be performed via the autopilot control head. Please click here to view a FAQ addressing this subject.