Busy day, and not feeling too chipper, so you get videos instead of my deep thoughts.
By the way, with regards to the plotting room, you’ll note that the major weakness of coast artillery fire control was that it depicted where the target was, not where it is, or will be. That is, the time lag between when the azimuths are transmitted and when the location is made is quite lengthy, and the ship has moved from that position while the calculations are made. Given average ship speeds in 1895 when the system was designed, this wasn’t a terrible handicap.
But by the 1920s, when steam turbine ships routinely exceeded 30 knots, that meant hand plotted fires would be practically useless. Indeed, shipboard fire control systems (and anti-aircraft fire control) not only continuously plotted range and bearing (though electromechanical means) they also predicted target location in the future, out to the time of flight for a projectile t0 the predicted range.