kierton23,
I did my first take of the Nav exam just after i'd done the ground school last year, but had no practical nav experience yet. I failed with a dismal 60% score, I was told the plog was what had caused me to fail.
Now just after doing all my nav exercises, and the cross country qualifier, I was confident i'd do the plog section without any problems. experience certainly helps, if your memory isn't great (like mine).
i also done the confuser questions, and the AFE Q&A simplifier tests, to train the trick questions out of me (especially like the radial / OBS question). the confuser definitely helps.
The last 5 questions are on radio nav equipment, and are pretty simple.
If you get your plog right (keep your pencil sharp!) the only question you may get wrong is the magnetic heading calculation, as others have mentioned. The time question related to this gives you a bit more latitude as to the accuracy of the answer choices. Learning the functions of the whizz wheel is important.
The problem with the maps is that you have to use the edition that was used when the exam was written, due to possible subsequent changes in charts. This means that the maps will be knackered. Just lay the entire map out if you have space, and make sure your lines are accurate, your pen isn't too blunt, and your protractor is the right way up!
second take on saturday just gone, 3 wrong, 2 my own silly fault (overthinking the answer as I thought it couldn't be that simple / logical) but most of it is simple logic.
good luck
andoni