(Andy Durbin) wrote:

How good predictions are is a matter of opinion, but GPS_LOG WinCE
provides just about all you asked for.

Henryk Birecki

You need to have a good prediction of your finish time based on
current ring setting, task distance left to go, average speed up to
now, and current wind estimate. I also find a graphic depiction of the
turn areas to be very useful.

In addition you need the ability to move the turnpoint in the area
before you reach it and to easily reset it to the point that you
actually turn at. Of course those turnpoint moves should result in a
new estimate of time to complete the task.

Look carefully at candidate systems to see if they support these
features. There are different methods for moving the turnpoint, some
systems do not use the wind estimate to calculate the finish time,
some systems do not support the much needed "turn now" function.

Andy (GY)