On Jan 28, 3:40*pm, Bertie the Bunyip wrote:
wrote in news:7ca97382-7571-4065-a244-9cb7dff15e22
@e4g2000hsg.googlegroups.com:

On Jan 28, 2:07*pm, Bertie the Bunyip wrote:
One other simple nav trick is to be aware of how many degrees a
particular point of your airplane is form your eye position.

Another is that the tip of your thumb at arm's length subtends four
degrees. (Both portable and hard to lose.)

You must have very fat thumbs!

Hand extended, thumb and pinky stretched to max, twenty degrees. Width
of fist, ten, and thumb about 2 to 2.5 . I haven't flown too many airplanes
you can get your arm striaght out in though!

Sorry, I meant length, not width (distance from last joint to end).