Paco could you please elaborate what type of things the circular computer can calculate compared to the CRP-5?
BTW the CR-3 you are both talking about, at least the Pooley's one. Seems to be made for American pilots, as I can't not find it in any european store.
I can't not even find it on transair, i can only find the E6B Circular computer, is is the same as the CR3?