Just going back to square one for a minute.
If the rule was made in the 60's say, back when Leigh's slow bird was
the standard, consider what a relative modern standard should perhaps
be, given higher speeds etc. Perhaps it should be 300 feet or more, say
100 metres.
Ian, Mike and others have made the point that an apparently arbitrary
number isn't the answer, good sense and airmanship is.
The problem then is, a number becomes a false security deal, since it is
unworkable for the reasons put by some, ie, difficulty accurately
judging distances, different pilot skills and glider performance
characteristics in the one thermal, etc.
Which puts us back to thermal etiquette, and Mike Valentine's Aug 92
article, and the comp briefings mentioned above, as a basis for "the
standards" to teach, and apply.
The "apparent" lack of uniform teaching, reinforcement, and adherence to
these principles, at club level, is, I think, still an issue to be
addressed.
--
Peter Creswick
E-mail [EMAIL PROTECTED]
Land Line 02 9718 4841
Mobile/SMS 0401 758 025
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