Thanks all, makes perfect sense. Generally, steer to whatever compass
direction will make the boat actually *travel* the course that the GPS
sets out.

Harry - Yup, I agree the manual is pretty good. I just get the feeling
that there is more to be understood about ways to be using this
device than are in this 60 page manual. ~ This highway question
is a good example: Page 19 tells me exactly what I need to do. But
it didn't explain the currents/cross winds question.

Ok, thanks again.
Gary