They paddled their oars.
They paddled oars
Having a shallow draught, Viking longboats allowed for sailing or rowing up shallow rivers.
The Vikings used their long boats as cargo vessels. Since these boats were seaworthy and had a shallow enough draft to go far up rivers, the Vikings could trade, or raid, all along the coasts and navigable rivers of Europe. The Vikings are remembered primarily as raiders in France and England, but primarily as traders in parts of Eastern Europe. Their routes went as far as Constantinople, where numbers of them were hired as personal bodyguards for emperors.
The Vikings' boats had one sail because they also had oars with which to row.
boats
the vikings used longships :)
The longboat was so important to Vikings because it traveled them across the sea and took them wherever they needed to be at that time.
The viking boats were called tall ships
Vikings
Longships.
by boats
to protect it
Because in older times trade was done via boats therefore the bigger trade cities had to be near rivers so the boats could come up the rivers from the sea.