Any old timer Navy guys know what this is?

Red was night, yellow was high contrast day, polarized was to reduce haze, clear was clear. 3/50 was a 3" bore and a 50 x bore (3) inch barrel length, so 12.5 feet long. Broadsides from 9 16's would move the ship but not 8-10 feet, more like 3 feet of roll. There would be a horn blown before the big guns fired a broadside so everyone could be prepared for the movement, ie. not against a wall. Single guns going off would just rumble the almost airtight ship under firing conditions. Someone told me they never do a true broadside but its a very short ripple of the 3 guns in the turret, or else the shock of all 3 at once would damage other stuff on the boat. I mean whenever are you going to need 9 shells all leaving at once? Can't confirm this but sort of makes sense when I heard it. We saw the Mo in Subic Bay in '88 when it pulled in