The great sea expeditions of the Viking Age - The basis of the great sea expeditions undertaken by the Vikings was ship technology. The Viking ship was a piece of high technology based upon hundreds of years of development and experience.
Beginnings of the Viking peoples: The Scandinavian peoples and tribes from the Vendel Period to the Viking Age
The Vikings were not the first people to build ships but they did build the best ships anyone had made up to that time. Viking ships often had Dragons heads mounted on the bow to scare off sea monsters.
Snekkja WIP by Thorleifr on deviantART. To to make a sculpture from a block of wood. This pin gives step by step instructions to help you carve the structure from all angles. Great beginning woodworking tutorial!
doesn't really look like a dragon to me. It is a terrifying image though so I can see why the Vikings included images of dragons on the front of their ships. It was a way to intimidate their opponents.