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According to the Definition from Annex I to Part-FCL regarding linear and angular laterally guided operations during approach phases of flight, which of the following statements is true?

  • A

    Linear guidance means instrument approach operation in which the maximum tolerable error/deviation from the planned track is expressed in terms of deflection of the needles on the Course Deviation Indicator (CDI) or equivalent display in the cockpit.

  • B
    Angular guidance means instrument approach operation in which the maximum tolerable error/deviation from the planned track is expressed in units of length, for instance nautical miles, for cross-track lateral deviation.
  • C
    Angular guidance means instrument approach operation in which the maximum tolerable error/deviation from the planned track is expressed in percent of maximum deviation distance for cross-track lateral deviation.
  • D
    Linear guidance means instrument approach operation in which the maximum tolerable error/deviation from the planned track is expressed in units of length, for instance nautical miles, for cross-track lateral deviation.

"Angular operation" means an instrument approach operation in which the maximum tolerable error/deviation from the planned track is expressed in terms of deflection of the needles on the Course Deviation Indicator (CDI) or equivalent display in the cockpit.

"Linear operation" means an instrument approach operation in which the maximum tolerable error/deviation from the planned track is expressed in units of length, for instance nautical miles, for cross-track lateral deviation.

Source: EASA Part-FCL - Annex I

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