Ancalagon
Dusty Dragon
So the variability in damage comes from the number of hits, not per cannon... fair enough.
small medium large for cannons is acceptable I suppose, although a "4 size" system could work too?. Doing the "4, 6, 8, 12, 18, 24 and 32" royal navy bit would probably be too granular. I think some heavy guns had more range than the medium ones, but I think the way to go is extend the long range, not improve the 600 feet mark.
How big is a "square" on this naval scale? I am suspecting 100 feet, but considering that a 32 gun frigate was about 150 feet long, or a 74-gun third rate could be over 180 feet long... maybe a bigger square could be used? That would extend your "room"
Sounds reasonable
small medium large for cannons is acceptable I suppose, although a "4 size" system could work too?. Doing the "4, 6, 8, 12, 18, 24 and 32" royal navy bit would probably be too granular. I think some heavy guns had more range than the medium ones, but I think the way to go is extend the long range, not improve the 600 feet mark.
How big is a "square" on this naval scale? I am suspecting 100 feet, but considering that a 32 gun frigate was about 150 feet long, or a 74-gun third rate could be over 180 feet long... maybe a bigger square could be used? That would extend your "room"

The attack bonus is just a basic +2 proficiency bonus, and a +1 Dexterity bonus for a military-trained crew. A normal merchant ship probably has +0.
Sounds reasonable