Garmin MX20 - Manual (Page 108)


Detailed Operation
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 with-
out 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.
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 head-
ing of the aircraft at all times.
Invert Option
As with the basic maps, the chart image can be inverted using the standard invert key.
Chart View