Tradition says "longboats". These are usually pictured as having dragon' s head prows (at the front) but there's not a lot of evidence for that. They were shallow draught fairly flat bottomed boats well suited to going up-river as well as crossing the North Sea. Take a look at at the Jorvik, and York Archeologiacal Trust, websites.
The Vikings' boats had one sail because they also had oars with which to row.
boats
some sail boats have moters onley big sail boats have moters not small ones
boats is the answer to your question
There are sail boats, ugly boats, pretty boats, speed boats, fun boats, unfun boats, amazingness boats! i luv boats! i own a boat!!there are sail boats row boats speed boats paddle boats
Vikings traveled in boats that were able to travel the Atlantic Ocean yet handle shallow water. This allowed the Vikings to raid and pillage villages in Britain, Ireland and the European coastline. They also walked and some rode horses.
No, he did not.
Scandinavia.
By using a sail and at last resort a mortar
the vikings used longships :)
There are sail planes, sail boats, sail cars, and with a spaceship you could sail to the stars.
Bays