On Wednesday, March 13, 2013 11:41:47 AM UTC-4, Dan Marotta wrote:
I don't understand.

That's because you don't use a Cambridge 303 display with your 302.

Even with XCSoar, I used the 303 routinely. Even with ClearNav, I still use the 303 routinely. It's reliable, it's backup, it's very easy to read. One advantage of the 303 versus any full on glide computer: there is very little to get wrong. Provided that your database is correct, there is really no (easy :-)) way to screw up a final glide calculation.

T8