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The FMS navigation database includes the following data:

1 – obstacles
2 – waypoints
4 – terrain
5 – magnetic variation

The combination that regroups all of the correct statements is:

  • A
    1, 3, 5.
  • B
    2, 3, 5.
  • C
    1, 2, 4.
  • D
    1, 2, 3.

The navigation database of the FMC contains all the information that would normally be obtained from the navigation charts. In each aircraft, the FMC has two sets of navigation data, each valid for 28 days. Each of them conforms to a revision cycle that the crew will check and select during the cockpit preparation, usually done by the pilot flying who sets up the FMC. The nav database is updated by maintenance every 28 days.

It includes the following data:

  • Airports
  • Navaids
  • Airways
  • Waypoints
  • Runways
  • SID, STARS, and approach procedures
  • Magnetic variation.

Note: The obstacles and terrain are not part of the FMS navigation database. They can only be found in the EGPWS database.

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