john smith wrote in message .. .
For those of you using handheld GPS's when you fly IFR:

Do you use the throttle to increase/decrease power to match the ground
speed to the approach speed table so the time is correct to the MAP?

Or,

Do you use the distance to the airport to determine/verify the MAP, even
though the time may not have expired?

Fly the same airspeed as always, measure the groundspeed from the GPS,
and interpolate the timing table for your ground speed.

One thing to remember is that the MAP does not have to be over the
airport. It may be a few miles before the runway, or past the runway.
This is a concern even when using an approach certified GPS because
the MAP may not be in the database. An example would be a MAP that is
a DME fix off a localizer. Most GPS databases do not contain the
lat/lon for localizer stations.