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Modern loading bay with overhead door, dock leveller and dock shelter. A loading dock or loading bay is an area of a building where goods vehicles (usually road or rail) are loaded and unloaded. They are commonly found on commercial and industrial buildings, and warehouses in particular. Loading docks may be exterior, flush with the building ...
Dock plates and dock boards are generally portable; dock levelers and lifts are generally permanent fixtures. [2] Dock plates and dock boards are simply metal ramps which bridge the gaps between dock and truck. [4] Dock plates are generally made out of aluminium whilst dock boards are generally made out of steel for greater strength
The Coast Guard cutter USCGC Sledge (WLIC-75303), a 75-foot construction tender homeported in Baltimore. USCGC Anvil (WLIC-75301) USCGC Hammer (WLIC-75302) USCGC Sledge (WLIC-75303) USCGC Mallet (WLIC-75304) USCGC Vise (WLIC-75305) USCGC Clamp (WLIC-75306) USCGC Wedge (WLIC-75307) USCGC Spike (WLIC-75308) USCGC Hatchet (WLIC-75309)
The operator runs the trolley over the ship to lift the cargo, usually containers. Once the spreader locks onto the container, the container is lifted, moved over the dock, and placed on a truck chassis (trailer) to be taken to the storage yard. The crane also lifts containers from chassis on the dock to load them onto the ship.
Initially a linkspan was a ramp that was attached to the pier at one end and was suspended above the water at the other. The height above the water was controlled either by hydraulic rams or cables, these types of linkspans were less well designed for the various conditions of the tide, wave and current and so were superseded by underwater tank linkspans that through compressed air can be ...
Keeper-class ships were the first Coast Guard cutters equipped with Z-drives, which markedly improved their maneuverability. [11] The Z-drives have four-bladed propellers which are 57.1 inches (145 cm) in diameter [21] and are equipped with Kort nozzles. They can be operated in "tiller mode" where the Z-drives turn in the same direction to ...