Fizzy Bear,
I agree with what Send Clowns and powdermonkey have said, you do not want to be relying solely on feedback. Gen Nav has quite a large syllabus (in that respect it is similar to MET, which is unfortunate for you) and you really need to work your way through whichever manual you have. I had the Oxford manual, which I found served me well, albeit it can go unnecessarily deep in some chapters - but this depth will serve me well come interview time, so I'm not complaining. When you are finished with the manual, hit feedback, and hit it hard. Also, try to ensure it comes from a reliable source i.e. Oxford or use B.G.S.'s excellent on-line Q.B.
With so many questions designed to catch you out, with a word or two changed here or there, I decided to break the feedback into individual subjects so that I would be able to recognise these subtle, but all important, differences. This, combined with putting many hours into Oxford's manual, meant I walked away from February's Gen Nav with a 94%.
If you want I could email you the individual subjects, these being:
Lambert/Mercator/Oblique/ Transverse, Time, EFIS, FMS, FMC, PSR/PET, IRS, INS, and COMPASSES
As for MET, do a search for Steve Francis (the weather man).
VC10 Rib22
