Pontoon bridge transport soldiers and artillery across rivers in the South. In 1872 at a military review before Queen Victoria, a pontoon bridge was thrown across the River Thames at Windsor, Berkshire, where the river was wide. The bridge, comprising 15 pontoons held by 14 anchors, was completed in 22 minutes and then used to move five battalions of troops across the river. It was removed in 34 minutes the next day. The British Blanshard Pontoon stayed in British use until the late 1870s, when it was replaced by the "Blood Pontoon". The Blood Pontoon returned to the open boat system, which
Trimaran hull". The outrigger hulls are "floats". The structures between the main hull and the floats are called the "wings" and the structural portions thereof are "beams"). In cruising trimarans the wings are solid and cabin accommodation extends over them, while in racing trimarans accommodation is limited to the main hull and the wings are open sheets of netting. In comparison to outrigger canoes, trimarans typically feature a sail (or engine) and are not primarily designed to be paddled. Trimarans are typically significantly wider. In addition, trimaran floats are much more buoyant than those of outrigger canoes to support a large