 Nautical units often play a secondary role, but can be essential to victory. Fishing boats are similar to villagers in that they can gather fish. Merchant ships trade resources from the stockpile and exchange it for gold at another player's dock, with the amount of gold earned being relative to the distance between both docks. Transport ships carry land units from one area of land to another. As well as attacking enemy ships, warships can be very effective in attacking land-based units close to the shoreline (because melee units cannot fight back). Warships come either as galleys which fire arrows or triremes which launch bolts or boulders (very effective against buildings near the shoreline).
