Are you also considering the ship doing the firing? Consider this: A
battleship fires it's guns and hits. (Think WW II with the 18 inch
guns of the Japanese battleships. If one of those shells hits it
pretty much dooms a small ship like a destroyer or frigate, but still
seriously damages larger ships like cruisers and battleships.) Also
consider ship armor and ship size. Smaller ships tend to lightly
armored and harder to hit, thus the faster speeds. But the bigger
ships have more size and armor, thus they tend to be slower and easier
to hit.
f