Hi Flyingdogguitar, I sat the May Gnav exam, and I can say that it is reasonable to expect 15 - 20 questions requiring the use of the wizz-wheel. As for Rhumb line, C.A type calculation questions, you can expect maybe a few of those's, although none appeared in my exam. The rest of the questions are made up of straight worded questions on maps, charts with a few IRS/INS thrown in to boot, Also expect at least 2-4 P.E.T and P.S.R type questions, these are the big boys, some being 4 marks each.
I hope this helps
The96er