On 4/7/2005 12:01, John Theune wrote:

Mark Hansen wrote:
On 4/7/2005 11:09, airman wrote:

Would extending daylight savings time give us more daylight?

See Rep. Ed Markey's comments:

http://news.yahoo.com/news?tmpl=stor...e&sid=84439559




As far as the aviation rules are concerned, night time is dependent on
the position of the Sun, and not an arbitrary time value. If you're
talking about whether your flight will be considered legal or not, the
wall-clock time has nothing to do with it.


However, I believe the times for sunset are given in local time not GMT
and all those tables would have to be updated.

Actually, the times are based on calculations that only know about
your latitude/longitude. The local time is added later when the
final table is printed.

In any case, what I meant was a change to the daylight time rule
would not result in more time during the day to fly under daylight
rules. It would simply shift the period forward or back a little,
based on the local offset from GMT.


--
Mark Hansen, PP-ASEL
Sacramento, CA