3-20 Pilot’s Guide 190-02488-01 Rev. B
Navigation
Map Overlays
Overlay Controls
TOPO
TERRAIN
Overlay Selections
• TOPO
• Terrain
• Traffic
• NEXRAD
• METAR
• Lightning
• TFR
• Airspaces
• Airways
• Obstacles
& Wires
Overlay data controls reside in the Map
menu. Changes to an overlay setting
take effect immediately.
NEXRAD, Terrain, and Lightning
overlays are mutually exclusive.
Enabling one automatically disables the
other.
Weather product and traffic overlays
are optional on GPS 175 and GNC 355.
They are available only when configured
for ADS-B In equipment.
Control keys enable the specified overlay function only and
do not activate interfaced equipment. Control keys remain
active even in the absence of required data.
Overlay controls reside in the Map menu.
• Overlays topographical data
and ground elevation scale
• Depictions are similar to a VFR
sectional
• Pilot-selectable topographical
elevation scale available
• Overlays terrain map data
• Color shading depicts terrain
elevation relative to the
aircraft’s altitude
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