Local
Twilight
Hours
GenAv
Flight Office is shipped to you with
twilight hours of your local airport. The data has been obtained from the US Naval Observatory and converted to a database
compatible to GFO. On the booking sheet, time slot hours (on the left) in red indicates official night time.
The example below
16:56 represents
official night (grounding time) while 7:18 indicates official day for your
local airport.
