Longship
The largest warships of the era were of the Drakaar (dragon) type. King Olaf I of Norway had a famous longship of this design called Long Serpent. King Olaf II of Norway had a longship named Visunden (the Ox). It had an Ox head carved in the prow. Matilda of Flanders had a ship built for her husband  William the Conqueror of the Drakkar design. It was named the Mora and was built at Barfleur in Normandy in the summer of 1066. This type could operate in shallow water and was easy to beach.