Unless engaging at short range, this is less of an issue- longer distances enable you to hit the even more vulnerable decks.
AWESOME WARSHIP CRAFT SHIP FULL
Beware that a warship usually is able to unleash its full might here, but so will you. This rule is especially prevalent with the Mk 45 5 inch Gun and the Oto Melera 76mm Compact, whicn relies on the strategic placement of artillery shells to deal maximum damage. By attacking only one side, you could capsize an enemy vessel easily.