"wg992000" wrote in message ...
Thanks for all the input -
It was the swinging the compass input I was after.

Thought process was that maybe with decent sat reception - swinging the
compass (adjustments and compass card) may be easier and more accurate with
the GPS then using traditional methods i.e.. lining up bearing points,
shadows etc with my 13 year old at the wheel and me trying to do this. Have
a 21 coastal boat with compass in 5 degree increments. Sounds like the best
idea is stick with traditional methods or farm it out. In any case thanks
for all the help and thoughts.


Just a thought - why not get a fluxgate compass??? They compensate
automatically, usually by steaming in a large circle slowly, for
boat/ship/vessel deviation and compass swinging is therefore not
required.
I would have though that by now we would be seeing more small gyro
compasses, which of course always indicate true North, removing both
deviation and variation.