Timber rafting

thumb|Traditional raft, from the 1884 edition of Adventures of Huckleberry Finn A raft is any flat structure for support or transportation over water. It is usually of basic design, characterized by the absence of a hull. Rafts are usually kept afloat by using any combination of buoyant materials such as wood, sealed barrels, or inflated air chambers (such as pontoons), and are typically not propelled by an engine. Rafts are an ancient mode of transport; naturally occurring rafts such as entwined vegetation and pieces of wood have been used to traverse water since the dawn of humanity.

craft of rafting involving the transport of wood by waterway. UNESCO intangible cultural heritage

hooked pole used as a tool

canal in Telemark, Norway

type of flume used to float logs down to a sawmill

moving logs (sawn tree trunks) downstream along waterways

dam used to raise the water level in streams to float logs downstream

Norwegian national cultural heritage site

The lachter (also Berglachter) was a common unit of length used in the mining industry in Europe, usually to measure depth, tunnel driving and the size of mining fields; it was also used for contract work. In most German-speaking mining fields it was the most important unit of length.