There also aren't any moist adiabats on Mark's chart. Means you can't
predict cloud tops.
Use the BoM F160. It is a professional tool and is what it is for good reasons.
Matt Gage is right too. The chart tells you what was happening at the
time of the balloon flight. The airmass can always be modified by
advection as well as the amount of heating during the day.
If you fly at one place you can usually get a pretty good idea of
what surface wind/time of year etc will produce a good soaring day
even without the charts and models.
Mike
Borgelt Instruments - design & manufacture of quality soaring
instrumentation since 1978
www.borgeltinstruments.com
tel: 07 4635 5784 overseas: int+61-7-4635 5784
mob: 042835 5784 : int+61-42835 5784
P O Box 4607, Toowoomba East, QLD 4350, Australia
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