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These are pairs of hinged gates that form a "V" shape, with the deeper water outside the V. Water pressure thus holds them closed. These gates can be opened and closed quickly, so they are used for canal locks, to change levels, and also for most freight docks. As the function of a freight dock is to enclose deep water, such gates point inwards.
Folding Boat Equipment was developed in 1928 and went through several versions until it was used in WW2 to complement the Bailey Pontoon. It had a continuous canvas hinge and could fold flat for storage and transportation. When assembled it could carry 15 men and with two boats and some additional toppings it could transport a 3-ton truck.
A floating dock, floating pier or floating jetty is a platform or ramp supported by pontoons.It is usually joined to the shore with a gangway. The pier is usually held in place by vertical poles referred to as pilings, which are embedded in the seafloor or by anchored cables. [1]
The San Antonio class is a class of amphibious transport docks, also called a "landing platform, dock" (LPD), used by the United States Navy.These warships replace the Austin-class LPDs (including Cleveland and Trenton sub-classes), as well as the Newport-class tank landing ships, the Anchorage-class dock landing ships, and the Charleston-class amphibious cargo ships that have already been ...
The articulated platform has hinged connections between the main and the longitudinal beams. A rigid platform, the beams are bolted or welded together. The Syncrolift System was invented by Raymond Pearlson , who was later awarded the Sperry Award for the invention, development and worldwide implementation of a new system for lifting ships out ...
The interior configuration of the United States Navy's San Antonio-class amphibious transport dock shows features common to most LPDs. An amphibious transport dock, also called a landing platform dock (LPD), [1] is an amphibious warfare ship, a warship that embarks, transports, and lands elements of a landing force for expeditionary warfare missions. [2]