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- Definição1
- The angular difference between true north and magnetic north; indicated on charts by isogonic lines.
- Fonte1
- FEDERAL AVIATION ADMINISTRATION. Rotorcraft flying handbook (FAA-H-8083-21). Washington, DC: FAA, 2000. Disponível em: http://www.faa.gov/library/manuals/aircraft/media/faa-h-8083 -21.pdf. Acesso em: 10 fev. 2012.
- Fonte2
- FEDERAL AVIATION ADMINISTRATION. Helicopter flying handbook (FAA-H8083-21A). Washington, DC: FAA, 2012.
- Nota adicional1
- Information regarding this term is a result of researches developed by DECEA in cooperation with ANAC.
- Contexto
- Because the aircraft compass is oriented to magnetic north, you must make allowances for the difference between these poles in order to navigate properly. You do this by applying a correction called variation to convert a true direction to a magnet direction. Variation at a given point is the angular difference between the true and magnetic poles. The amount of variation depends on where you are located on the earth's surface. Isogonic lines connect points where the variation is equal, while the agonic line defines the points where the variation is zero.
- Subárea1
- Air Navigation
- Related Term
- magnetic variation
- Português
- variação
- Imagem
Variation.
Fonte: FEDERAL AVIATION ADMINISTRATION. Helicopter flying handbook (FAA-H8083-21A). Washington, DC: FAA, 2012.