>In aviation, a clock position refers to a horizontal direction; it may be supplemented with the word high or low to describe the vertical direction. 6 o'clock high means behind and above the horizon, while 12 o'clock low means ahead and below the horizon.
>The 1949 movie Twelve O'Clock High takes its title from the system. In this case the position would be ahead and above the horizon.
Тут никто горизонт с относительной высотой не спутал?
Может и так, конечно, хотя сомнительно...