A bridge of boats over the Scheldt River, during World War I

A bridge of boats over the Ravi River in Pakistan, 1895

A bridge of boats is a temporary type of bridge which floats on the river instead of having permanent pillars. It is built by linking boats and the first and last being anchored to the shores. It was used as a military technique since ancient times, being the fastest method for an army to cross a river. The Scheldt in Antwerp Length 350 km Elevation of the source 95 m Average discharge 120 m³/s Area watershed 21860 km² Origin France Mouth Westerschelde Basin countries France, Belgium, Netherlands The Scheldt (Dutch: Schelde, French lEscaut) is a 350 km[1] (217 mile) long river that finds its... The Ravi originates near the Rohtang Pass in the Kangra Himalayas and follows a north-westerly course. ... A log bridge A bridge is a structure built to span a gorge, valley, road, railroad track, river, body of water, or any other physical obstacle. ... Lobster boat A boat is a watercraft, usually smaller than most ships. ...