Thanks for the explanation Don. Somewhat related, if a destroyer encounters an enemy task force of several ships and shoots its line of torpedoes, is the entire line aimed at one of the enemy ships or is the line fired as a "spread" into the entire enemy task force with a chance of the torpedoes hitting more than one ship?
Nope, they don’t shoot “spreads”. In Surface Combat, a “ship” fires a “weapon” (a ‘line’ if you will) at a “target”.
However, as Don mentioned, there is a chance that not all torps get “fired”, in one specific impulse, so there is a chance that the remaining torps can be “fired” at some other “target”, in a next impulse. And then there is a chance of reload (if available), with a couple more chances of engaging a couple more different “targets”, during subsequent impulses.
But, for each impulse in the SurfCom phase, it is basically, a ship “fires” one “weapon” (line) at one “target”.
Watching a SurfCom play-by-play will give you a good idea about how this works in practice.