Chart Notams; Important System Limitations; Invert Option - Garmin MX20 User Manual

Detailed Operation
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
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.
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INFO
key when that chart is selected.