Treenailed boats were use used by viking in which centuries?
Vikings Vikings (Old English: "wicing"—"pirate", Danish and Bokmål: "vikinger" ; Swedish and Nynorsk: "vikingar" ; Icelandic: "víkingar" , from Old Norse "víkingar "), were Norse seafarers, mainly speaking the Old Norse language, who raided and traded from their Northern European homelands across wide areas of northern, central and eastern Europe, during the late 8th to late 11th centuries. The term is also commonly extended in modern English and other vernaculars to the inhabitants of Viking home communities during what has become known as the Viking Age. This period of Nordic military, mercantile and demographic expansion constitutes an important element in the early medieval history of Scandinavia, Estonia, the British Isles, France, Kievan Rus' and Sicily.
Wooden ramps Wooden ramps were used by the Germans in World War II to defend areas from terrestrial and aquatic/semi-aquatic vehicles. A wooden ramp consisted of a medium-sized tree trunk angled 15-20 degrees, with the raised end towards land and supported by two or four legs. The wooden ramp could flip an amphibious vehicle over as it landed on the beach. The devices were sometimes made additionally dangerous by attaching mines to the log. The most famous use of wooden ramps was during the Allied beach assaults during Operation Overlord. The Germans used them to destroy Allied vehicles, particularly Landing Craft Mechanized boats and Sherman DD tanks. However, because the Germans expected a high-tide landing, they primarily positioned the wooden ramps too far up the beach. Had events gone as they predicted, the ramps would have been mostly underwater and thus less visible.