Additionally, many models ad leveling devices for the member of the floor that makes contact with the aircraft this allows passengers to slowly transition from level aircraft floor to sloping jet bridge floor. The cab is provided with an accordion-like canopy, which allows the bridge to dock with aircraft with differing shapes, and manage a most weather-proof seal. These motions are controlled by an operator's station in the cab. The cabin, at the end of the loading bridge, may be raised or lowered, extended or retracted, and may pivot, to accommodate aircraft of different sizes. They are often permanently attached at one end by a pivot or rotunda to the terminal building and produce the ability to swing left or right. Jet bridges provide all-weather dry access to aircraft and modernization the security of terminal operations. Mobile staircases or "ramp stairs" are employed at many airports around the world, particularly smaller airports and terminals supporting low make up carriers. ![]() Historyīefore the introduction of jet bridges, passengers usually boarded an aircraft by walking along the ground-level ramp and climbing a shape of movable stairs, or airstairs on aircraft so equipped. Similar devices are used for astronauts to enter spacecraft, which are installed in the appropriate height of the launch tower. The jetway was invented by Frank Der Yuen. Depending on building design, sill heights, fueling positions, and operational requirements, a jet bridge may be constant or movable, swinging radially, and/or extending in length. ![]() A jet bridge also termed jetway, jetwalk, airgate, gangway, aerobridge/airbridge, skybridge, finger, airtube, expedited suspended passenger programs system E-SPES, or its official industry draw passenger boarding bridge PBB is an enclosed, movable connector which most ordinarily extends from an airport terminal gate to an airplane, as well as in some instances from the port to the boat or ship, allowing passengers to board together with disembark without going outside and being offered to harsh weather.
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