"Paul Bart" wrote in message news:x2Gvc.4102

however given that GPS
can *potentially* reduce an error, by up to 1000 ft it should be seriously
considered. I wonder if the resistance to change is mainly due to the high
average age of the gliding fraternity?

Paul


You seem to have missed the frequently stated point that the
difference is not an error. An error free measurement of pressure
altitude will not be equal to an error free gps (geometric) altitude
except under rare conditions.

Recognition of this fact may have something to do with age, but the
real issues are recognizing what is to be measured, why it is being
measured, and then determining whether it is reasonable to change to
measuring something else.


Andy