In article ,
says...
Reread my post; I wasn't discussing turn-signals. I was only discussing: You
can see an entire airplane much farther away than you can distinguish the
wings

I'd tend to disagree with that. A turning plane is often easier to
spot. Or... here's a good example, ever tried spotting a plane that's
comin' right at you? (how about a glider?) - bloody hard to see (until
they initiate a turn).

In short, the wings are the easiest bits to see - yep, sure, it all
depends on the angle of the dangle.

--
Duncan