How shipboard artillery might change Winchelsea

The closing prompt imagines that fourteenth-century ships retained artillery systems comparable to those used by the Romans. Likely weapon choices are connected to English longbow practice and Castilian reliance on crossbowmen, treating technology as part of a wider military system. The bounded counterfactual asks how each side might adapt artillery to its existing tactics, ship layouts, and personnel. The answer would depend on doctrine and trained manpower as well as on which machines were technically available.