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1

The approach speed that is shown on the MCDU performance page is based on the pilot entered wind or in Airbus terms, tower head wind component. The headwind component is the one which affects the aircraft energy on the approach. The approach speed also known as Vapp is calculated as follows: Vls (lowest selectable speed or Vref in landing config) + 5 knots (...


17

Earth's magnetic field is not symmetric north to south. In particular, the magnetic declination can get significantly larger at a given southern latitude than it does at the corresponding northern latitude. This can be seen by looking at a world declination map: Curves of a given declination reach much lower southern latitudes than they do northern ...


4

It looks like the "weather product age" for NEXRAD weather data, i.e. how old the current data you're seeing is (see Pilot's Guide, p.13). The number is contextual, based on the weather information type: The age of the displayed weather product—or the effective time of Winds Aloft predictions—is shown in the upper right corner of the display. For ...


1

These are RNAV procedures as defined in ARINC 424 used for database coding. They define paths which an aircraft must follow during RNAV departures and approaches. Every standard departure and approach can be divided into distinct sections. Each possible path starts at a point and ends at a termination point. The file format is standardized so that each and ...


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