Autopilot question

[frequent_flyer]

Is there a way to make the plane automatically stay on the green line programmed into the GPS? I know it can hold heading, but on long flights the heading changes because of the curvature of the earth.
-roger

[FatTulip]

Ensure autopilot is on and set to GPS instead of NAV or just use the flight director switch and follow the cross-hairs on your artificial horizon.

[Poonutz]

Autopilot on, GPS switched on, and then press the NAV button on the autopilot instead of HDG.

Robert

[frequent_flyer]

Thanks, I'll try that.
-roger