Sails

Ships would run on oar power and require hundreds of crew and slaves without these marvels of technology. A sail allows a ship to harness the wind to move, rather than using simply oars, though it takes a skilled Captain to use properly, and sails vary in quality based on the material they are produced from.

Sails

Lords of Creation: Ancients of the Void Darklady2831 ToxicMind