we were told that if you used a CRP5 you had a chance of passing. If you used any of the other main stream wheels you would actually get the wrong answers but they would look right.
Ie one answer would be stupid.
One answer would work for using trig.
One answer would work using a Jep wheel
One answer would be right for the CRP 5 which was the correct one.
Something to do with the bloke that wrote most of the questions for NAV in the initial Q bank was a mate of Bob's.