On Oct 26, 9:07 am, Ian wrote:
SNIP
[1] and have no intention of doing so: I'm profoundly sceptical about
a further increase in the number of things to fiddle with and focus on
inside the glider. Why not just look out?

Because your human eyes can't detect most threats on time to avoid it,
especially gliders and especially if they are comming from behind or
the side. The only exception is during thermaling and maybe traffic
pattern where you know when and where to look.
See http://dwp.bigplanet.com/fosterflight/scottsrants/

Ramy