Mobile lounge
On January 26, 2010, the Metropolitan Washington Airports Authority replaced the Dulles mobile lounge system for passenger movements between the Main Terminal and the A-, B-, and C-Gates with the underground AeroTrain.However, some mobile lounges and plane mates remain in use for passenger movements between the main terminal and Concourse D (until the replacement Concourses C and D are built and the AeroTrain is built out to run in a continuous two-way loop), to disembark international passengers from all arriving international aircraft (with the exception of United Airlines and certain Star Alliance flights, which are directly serviced at Concourse C's Federal Inspection Station; and flights from airports with border preclearance) and carry them to the International Arrivals Building, and to convey passengers between the main terminal and aircraft on hard stands (i.e., those parked remotely on the tarmac without access to jet bridges).They are similar in appearance to mobile lounges, but can raise themselves on screws (parts of which are contained in a pair of fin-like towers above the vehicles) to "mate" directly with an aircraft.Early in the space shuttle program, NASA used the Plane Mate system of mobile lounge to move astronauts directly from the orbiter to crew facilities.A modified vehicle obtained from Baltimore/Washington International Thurgood Marshall Airport in Baltimore, Maryland was used for shuttle landings at Edwards Air Force Base.
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