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The longships had two methods of propulsion: oars and sail. At sea, the sail enabled longships to travel faster than by oar and to cover long distances overseas with far less manual effort. Sails could be raised or lowered quickly. In a modern facsimile the mast can be lowered in 90 seconds.
However, the method of crossing remains unknown and could have ranged from simple rafts to dugout canoes by the terminal Pleistocene. [13] [14] [15] The sea crossing by humans to the Sahul landmass (modern Australia and New Guinea) from the Sundaland peninsula occurred around 53,000 to 65,000 years ago. Even with the lower sea level of that ...
Ancient boat building methods can be categorized as one of hide, log, sewn, lashed-plank, clinker (and reverse-clinker), shell-first, and frame-first. While the frame-first technique dominates the modern ship construction industry, the ancients relied primarily on the other techniques to build their watercraft. In many cases, these techniques ...
Carvings of galleys on tombstones from 1350 onward show the construction of these ships. From the 14th century they abandoned a steering-oar in favour of a stern rudder, with a straight stern to suit. From a document of 1624, a galley proper would have 18 to 24 oars, a birlinn 12 to 18 oars and a lymphad fewer still.
A factory ship, also known as a fish processing vessel, is a large ocean-going vessel with extensive on-board facilities for processing and freezing caught fish or whales. Modern factory ships are automated and enlarged versions of the earlier whalers , and their use for fishing has grown dramatically.
Longships were naval vessels made and used by the Vikings from Scandinavia and Iceland for trade, commerce, exploration, and warfare during the Viking Age. The longship's design evolved over many years, as seen in the Nydam and Kvalsund ships. The character and appearance of these ships have been reflected in Scandinavian boatbuilding ...
Offshore aquaculture, also known as open water aquaculture or open ocean aquaculture, is an emerging approach to mariculture (seawater aquafarming) where fish farms are positioned in deeper and less sheltered waters some distance away from the coast, where the cultivated fish stocks are exposed to more naturalistic living conditions with ...
Clinker-built, also known as lapstrake-built, [1] [2] is a method of boat building in which the edges of longitudinal (lengthwise-running) hull planks overlap each other. Where necessary in larger craft, shorter hull planks can be joined end to end, creating a longer hull plank ().