Dugout (boat)
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A dugout is a boat which is basically a hollowed tree trunk. Other names for this type of boat are logboat and monoxylon. Monoxylon (pl: monoxyla) is Greek -- mono (single) + xylon (tree) -- and is mostly used in classic Greek texts.
Dugouts are the oldest boats archaeologists have found. In Germany they are called Einbaum (English translation: One tree). Einbaum dug-out boat finds in Germany date back to the Stone Age. Along with Hide Canoes, these dugout boats were used by Native Americans. This is probably because they are made of massive pieces of wood, which tend to preserve better than, e.g., bark canoes.
Construction of a dugout begins with the selection of a log of suitable dimensions. Sufficient wood needed to be removed to make the vessel relatively light in weight and buoyant, yet still strong enough to support the crew and cargo. Specific types of wood were often preferred based on their strength, durability, and weight. The shape of the boat is then fashioned to minimize drag, with sharp ends at the bow and stern.
First the bark is removed from the exterior. Before the appearance of metal tools, dugouts were then hollowed-out using controlled fires. The burnt wood was then removed using an adze. Another method using tools is to chop out parallel notches across the interior span of the wood, then split out and remove the wood from between the notches. Once hollowed out, the interior was dressed and smoothed out with a knife or adze.
For travel in the rougher waters of the ocean, dugouts can be fitted with outriggers. One or two smaller logs are mounted parallel to the main hull by long poles. In the case of two outriggers, one is mounted to either side of the hull.
External links
- Fundamental origins of ship types (http://cma.soton.ac.uk/HistShip/shlect11.htm)
- Ship replicas in the world (http://www.abc.se/~m10354/bld/int-repl.htm)Template:Sailing vessels and rigs