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The Boeing 747-400 is a large, long-range wide-body airliner produced by Boeing Commercial Airplanes, an advanced variant of the initial Boeing 747.The "Advanced Series 300" was announced at the September 1984 Farnborough Airshow, targeting a 10% cost reduction with more efficient engines and 1,000 nautical miles [nmi] (1,900 km; 1,200 mi) of additional range.
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The Boeing 747 is a long-range wide-body airliner designed and manufactured by Boeing Commercial Airplanes in the United States between 1968 and 2023. After the introduction of the 707 in October 1958, Pan Am wanted a jet 2 + 1 ⁄ 2 times its size, to reduce its seat cost by 30%.
Very wide planes such as the Boeing 747 or the Airbus A380 have ten seats abreast, typically in a 3+4+3 layout, although this layout is also sometimes used as a high density layout on aircraft normally seating nine abreast, such as the 777 or DC-10. Recently, airlines have been adopting ten abreast seating on the Boeing 777-300 aircraft. [7]
Seat maps usually indicate the basic seating layout; the numbering and lettering of the seats; and the locations of the emergency exits, lavatories, galleys, bulkheads and wings. Airlines that allow internet check-in frequently present a seat map indicating free and occupied seats to the passenger so that they select their seat from it.
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The aircraft noise from the 747-8 has earned it a Quota Count of 2 for takeoff and 1 for landing at London's three major airports, a significant improvement over the 747-400. [67] In February 2015, the Boeing 747-8 Intercontinental was given 330-minute ETOPS approval, the first time that ETOPS-330 approval was given to a four-engined aircraft. [68]