Its not so much about the type of A level you have, as much as it is about what sort of work load you can cope with. People with Math and Physics do cope better with all of the Nav, weapons and electronic defence systems, than say somebody with only an Arts A level. Now before I get screamed at by the Art's A levellers on here, it was just an example. The Math and Physics part of a pilots training is or was quite daunting. However the board will weed out those who they think can't hack it.