Whilst these questions may look hard, they really are not once you have done a bit of work. Certainly everyone I have spoken to agrees that Nav Gen is one of the easier exams especially now that there has been some feedback, and the schools know exactly what to teach.
Rob, I think it is fair to say that a good school will not teach you the answers, but will instead teach you how to work out the answers.
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CW
The original not the imposter!