Apollo MX20 User's Guide download pdf (Page 108)

phase without having to manually un-load the approach

and adjust the zoom scale.

The transition logic is based solely on aircraft ground

speed.

When an approach chart is loaded and being flown, and

the aircraft ground speed drops below the air/ground

threshold (set from within the SYS Function), it is

assumed that a landing has been performed. At this point,

the loaded approach chart is automatically unloaded and

the airport surface chart will be presented on the screen

showing runways, taxiways, etc.

However, if approach chart is loaded and being flown and

the aircraft crosses the missed approach point without

slowing, it is assumed that a missed approach procedure is

being performed. In this case, the automatic transition to

surface maps does not occur and the approach is not

automatically un-loaded. See the Initial Zoom and

Transition Speed selection in the System Function (Page

106).

Chart NOTAMS

Any applicable NOTAMS that apply for a given chart are

shown under the

INFO key when that chart is selected.

The chart should be viewed for NOTAMS before use.

Important System Limitations

Note that while on the ground and viewing airport surface

charts, the display can be oriented in the “Track Up”

mode. In this mode, the last known GPS-based track as

obtained from the external GPS navigation system is used

to orient the map. GPS track is typically not accurate at

low speeds and does not reflect the actual heading of the

aircraft at all times.

Invert Option

As with the basic maps, the chart image can be inverted

using the standard invert key.

Detailed Operation

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Apollo MX20 User's Guide Page 108