Got this link from the SASR network. Maybe some old mortarman, or a young one for that matter, could explain the maths.
I seem to recall being in command of an ambush on Christmas eve 1970 at the base of the Lang Hais and the Artillery put up flares that popped in the shape of a Christmas tree. This was followed by a Cessna 180 broadcasting Christmas carols through it’s boom box. The flares made me feel exposed, the carols stopped me hearing any movement out front and overall I didn’t feel any goodwill to my fellow man. In fact if I had seen any, I would have shot and killed them.
It’s a weird world.