Thanks to all of you for some very informative info. Yes, Dr. Jack's stuff
is excellent. I hope those of us who use it go ahead and subscribe to
support his efforts.

Agreed! BlipMap has been an invaluable resource to help me pick some
really good days to go soaring. And, while there haven't been any
noises to that effect lately, let's remember that this gem could
disappear tomorrow without the dedicated work of Dr. Jack and a few
others. Until the subscription started a couple of years ago, they were
subsidizing the out of pocket expenses themselves, not to mention
contributing many, many hours of time. So I'll add my plea to the
above. If you soar and use BlipMap, please subscribe, or even better
contribute more than the minimum. If you think what a tow costs, it's
well worth the cost.

Martin