Griffin is the co-founder of the William E. Colby Seminar on Intelligence, Military, and Diplomatic Affairs at Norwich University in Vermont, along with his friend, historian, and Patton biographer Colonel Carlo D'Este.
A Viking's height could be anywhere between 66 inches 1.67 meters and 69 inches 1.75 meters. The tall ones are said to be Vikings of higher stature since they are likely to have better nutrition and eat better diets compared to the common Viking warriors. The notion that Vikings were tall people may also be because people in some parts of Europe are relatively short. This may be the reason why they might consider Vikings as people with increased height. But compared Viking's height to today's people, they are considered as people with average height.
Well preserved remains of Viking ships, like those found at Oseberg and Gokstad in Norway and Skuldelev in Denmark, show they were clinker-built of overlapping planks and measured between about 17.5m and 36m in length. They were steered not by a rudder, but by a single oar mounted on the starboard side.