Stop winging. Piece of cake now. In my day, we had the wonderful fuel planning - Falklands and back. Everyone failed as they forgot to allow for the weight reduction after the bombing run
At least I was too young for the astro navigation paper, but I remember the principles of flight had no syllabus and simply wasnt taught. Add in sudden death with morse code off a ghetto blaster and it is clear nothing has changed. This is a test of how well you can learn how to work the system and not about knowledge. Same in medicine and many other areas.....