Friends across the road in B site get AD pay (an extra allowance for hanging out the doors in flight). Currently @ £6 a day extra many a mortgage has been approved on those extra sums!
The crux is those AD types WORK in the air whereas the Mover waits for the ship to land to commence toil. I think this is where the line is drawn. If you operate in the air u recieve the pay. If you dont....you won't. Simple!! XX