pulse1 (your #7919),
The key words here are:
...AIR OBSERVERS' NAVIGATION SCHOOLS' EXAMINATIONS...
Which lets us Twin-Winged Lords of the Air - or Drivers (Airframe), according to taste, - off the hook, I'm very glad to say. Had a quick run-through the question paper, felt faint and had to have a lie-down. Greatly increased respect for all "
Flying A###'oles" from now on.
(Sign of the times: absolutely correct use of apostrophes. Sadly, today these still give a lot of trouble: the distinction between 'its' and 'it's' in particular is too much even for some PPRuNers, I'm sorry to say).
Danny.