Below you will find the amounts per ship and cannon ball size to max a ship as well as the amounts that will sink each ship size.
The first number is to max the ship, the second after the "/" is to sink the ship.
Ship...............Small cbs.......Medium cbs......Large cbs
Sloop..............6./.10..........4./.6.66........3./.5
Cutter.............7.5./.12.5......5./.8.33........3.75./.6.25
Dhow...............7.5./.12.5......5./.8.33........3.75./.6.25
Junk...............15./.25........10./.16.66.......7.5./.12.5
Longship ...........9./.15.........6./.10..........4.5./.7.5
Baghlah............12./.20.........8./.13.33.........6./.10
Xebec..............21./.35........14./.23.33.......10.5./.17.5
Merchant Brig......12./.20.........8./.13.33.........6./.10
Merchant Galleon...18./.30........12./.20............9./.15
War Brig...........15./.25........10./.16.66.......7.5./.12.5
War Frig...........30./.50........20./.33.33........15./.25
Grand Frig.........36./.60........24./.40...........18./.30
The first number is to max the ship, the second after the "/" is to sink the ship.
Ship...............Small cbs.......Medium cbs......Large cbs
Sloop..............6./.10..........4./.6.66........3./.5
Cutter.............7.5./.12.5......5./.8.33........3.75./.6.25
Dhow...............7.5./.12.5......5./.8.33........3.75./.6.25
Junk...............15./.25........10./.16.66.......7.5./.12.5
Longship ...........9./.15.........6./.10..........4.5./.7.5
Baghlah............12./.20.........8./.13.33.........6./.10
Xebec..............21./.35........14./.23.33.......10.5./.17.5
Merchant Brig......12./.20.........8./.13.33.........6./.10
Merchant Galleon...18./.30........12./.20............9./.15
War Brig...........15./.25........10./.16.66.......7.5./.12.5
War Frig...........30./.50........20./.33.33........15./.25
Grand Frig.........36./.60........24./.40...........18./.30