On Feb 22, 8:18*pm, John Cochrane
wrote:
Just to expand a little on UH...

The CD will decide on a start height -- 3500 or more AGL, 10,000 or
less AGL, 500 feet below the clouds or tops of dry thermals, thinking
about how long it takes late starters to climb, etc.

The CD will then do the heavy math to translate this height to MSL and
he'll announce a MSL start top with nice big even numbers. Now you
look at your MSL altimeter and know if you're over the top or not. No
more trying to decide if you're over or under 6342 feet MSL because
the airport was at 1342.

This should avoid addition mistakes (which I have made too), *start
gates with weird MSL heights, endless radio calls to the advisers
asking MSL or AGL altitudes and so forth. It should also avoid
confusion we had last year with scorers and winscore getting confused
with each other over MSL/AGL

Same on finishing. The CD will decide a decent height for airport,
traffic, terrain, and announce a MSL height so it's easy and quick to
see if you're over or under.

John Cochrane BB

All well and good but rule 10.8.5.1.3 should then read "The Top of the
start cylinder shall be specified and labeled as MSL."

This avoids the conflict with the definition of MSH and removes the
considerable confusion caused by the conflicting rules, especially for
those that didn't find the old rules confusing at all.

Please don't add to the confusion by mixing the terms height and
altitude. I hope the CD, under the new rules, will announce a maximum
start altitude and a minimum finish altitude. Use the term height and
the confusion starts all over again.

Andy