Do battleships aim at a point or a line segment when firing at a moving target?
Short answerThey calculate the future point where the target should be when the shells arrive, using mechanical fire-control computers to update the solution.
NotesThe firing ship, target, and shell are all moving during the projectile's flight. Fire-control teams therefore calculated a future intercept point from range, bearing, speed, and course instead of treating the target as a fixed line segment. Mechanical fire-control tables acted as rudimentary computers that continuously processed those inputs. Their purpose was to make a difficult mathematical prediction repeatable while reducing the number of human errors introduced into the firing solution.