Busy day on the ranges, firing 75-mm armour piercing and HE shells. The tank rumbles up to the firing point and stops. The commander snaps out: ‘Action’, and the operator yanks the belt through the Browning-30 machine gun and lifts a two and a half foot shell from the rack by his right hand and clamps it into the 75-mm breech. ‘Both guns loaded’, he yells. ‘OK. Driver, advance’, the commander says quietly into his microphone. The tank rumbles forward. Suddenly, a target tank starts moving at twenty mph across the range. The commander sees it and raps a terse command into the mike: ‘Driver Halt. Gunner traverse right: steady on - 500 moving hornet - Fire’.  I‘m sitting in the operators seat and see the gunner’s knuckles whiten on the trigger. I press myself into the cold unfriendly steel of the turret to get as far away from the 75-mm as possible. I brace myself and tense my ears as the trigger is pressed. There is a terrific roar and it seems as if my eardrums are split. I grope blindly for another shell and ram it into the breech. Once again, there is a terrific roar of flame and the clang and stink of recoil, as the empty case is flung on the floor at my feet. And so it goes on, until firing in that confined space becomes a commonplace event. Now it’s quite good fun.
. The figure ‘500’ was a bearing and ‘hornet’ was code for a moving target.