On Jun 10, 2:16*am, Bruce Hoult wrote:


On any day that has a CIvil Twilight, for a start.


No, that may be used to define the time at which a task will end even
if the glider has not landed, but it does not define a maximum task
time in the context being discussed. Maximum task time would imply a
maximum allowed duration between the time of starting and the end of
the scoring flight.

Andy