Jet bridge
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A jet bridge is an enclosed connector which most commonly extends from an airport terminal gate to an airplane, and in some instances from a port to a boat or ship, allowing passengers to board and di
United Airlines planes lined up at their jet bridges at Denver International Airport in March 2014
A jet bridge at El Dorado International Airport in Bogotá, Colombia in August 2018
Three jet bridges feeding a Lufthansa Airbus A380 at Frankfurt Airport in Frankfurt, Germany in June 2011
Adaptation of airport equipment for all-weather ship access, Kobe, Japan
Airstair
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An airstair is a set of steps built into an aircraft so that passengers and crew can get on and off without needing help from outside. The stairs are built as part of a door or are lowered from inside
Jet bridge
…introduction of jet bridges, passengers normally boarded an aircraft by walking along the ground-level ramp and climbing a set of movable stairs, or airstairs on aircraft so equipped. Mobile staircases or "ramp stairs" are employed at many airports around the world, particularly smaller airports, terminals…
DC-3 modified with a simple airstair
Northwest Airlines Boeing 727 with ventral airstair open
3-section folding airstair on a "Combi" 737-200 aircraft of Alaska Airlines
George W. Bush boards a VC-25 using the lower-level airstair.