I know what you are saying captcook..............restricted instructor rating on knowing the colour of fields...............Its so important to know the colour of fields on a night
. So if you know the colour of fields during the day ,why does it stop you from flying at night, surely all fields are black at night and that doesn't help anyone cvd or not.........unless of course its a brightly lit retangle of white lights that depicts the shape of a runway how would we find that.? I don't know
Over the last 27 years I have some times spent 10 hours a day frequently in an aircraft and never had a problem........
regards ndr1804