What armor worked in medieval sea combat?

What armor did combatants wear at sea in this period?

They generally favored lighter armor that protected in close combat without crippling movement or making immersion even more deadly.

Light chain, brigandine, and leather-based protection offered a compromise between defense and mobility on ladders and crowded decks. Heraldic display could encourage ransom on land, but it obstructed climbing and offered little protection from being thrown into the sea. The English advantage also rested on a strong core of professional archers and men-at-arms accustomed to fighting together. Equipment choices at sea therefore reflected the need to climb, balance, and survive close combat more than the display conventions of mounted warfare.