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On 25 Dec 2005 11:26:54 -0800, wrote:

can a GPS (alone, no autpilot) show you the course or where you have
to point your bow (bearing) in order to drive a straight line to your
target. WITHOUT creating waypoints or "manual" input like adjusting for
cross track errors ...

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I think that if I understand your question, you are asking if a GPS
can be used as a navigation calculator to solve vector problems. If
so, the answer is no. Pilots used to carry something which resembled
a circular dial with rotating cursor arm if my memory is correct. I
believe you would enter your air speed, wind speed and wind angle and
it would calculate course correction or something like that. Is that
what you are asking? If yes, you could set up something on a laptop
or Palm Pilot using a spreadsheet or BASIC program. The math is not
that complicated if you are conversant with vectors and trig. TI used
to offer a Navigation package with their high end programmable
calculators that would solve vector problems.