How does a longship move?

A longship moves primarily through the combined use of sails and oars. The square sail, typically made of wool or linen, captures the wind to propel the ship forward, while the oars, manned by rowers, provide additional power and maneuverability, especially in calm conditions. The long, narrow design of the ship allows for swift movement through both open waters and shallow rivers, making it versatile for various maritime activities.