Frank
Grass is green because we know grass is green.
And that's my point. That's what im trying to find out what is seen is there a difference. As I said earlier my mate cant tell the difference between red and orange. he done all his aptl subjects but fail due colour test.
Cheers
What ever the flight you have to have a one up on this . And safety on casa is not the be end and end all. This can be beaten. Its depends though if you have to flight icao, that's going to be the hard bit.