In the 70's when the American 'Boomer' crews changed over at Holy Loch you could see the outgoing crew waiting in Prestwick Airport waiting for the TWA flight to take them home. The USN Shore Patrol, all very large people with very large sticks were not to be messed with, 1 tap from the stick was usually enough, 2 taps you were on the verge of something painful 3 taps and they were usually observed being 'helped to the aircraft.