In response to your question about the D/S/T test at Stage 1 above (I took my stage one tests with Deemo888 on Monday) I can confirm that the questions are aviation related rather than just random data not scenario specific...
e.g. A plane is cruising at such an altitude, travelling at X knots, suffers engine failure and is falling from sky at rate of X ft per min. How far until it hits the ground - that kind of thing.
Good luck with your stage 1.
Charlie