Blanche wrote:
Me, personally, have a 1/2-axis autopilot. Turn it on, it holds
the heading. Well, not really. Since it's not coupled to anything,
it doesn't know when there's any deviation, such as winds. I can
start out on a heading of 120, turn on the AP. If winds
are from the north, then my actual track is more southerly, depending
on the strength of the winds.

I assume you understand the difference between heading and track?