JP - oops! My profound apologies, I didn't RTFQ!
F3s are flown, as are all Air Defence Fighters, by bronzed sky gods of noble birth who zoom and soar where the air is rare.
Who also have big watches.
GR4s and other mud-moving trash are flown by low-life baby-eaters who live solely to 'blow $hit up'... They get hypoxic if they have to set 1013.
And they probably have to steal their watches from others.
Good luck to you at OACTU - in whatever branch you apply for.