Garmin GTN 625 Pilot's Manual page 195

8.1.1.2 Topo
The Topo Data option selects whether the colored topographical features are
displayed. Traffic, Land Data, Terrain, and Obstacles will still be displayed even
with Topo Data turned off.
1. While viewing the Map Menu, touch Map Overlays key, and
then the TOPO Map Overlay key to toggle the Topo setting.
Topo Map Overlay Off
2. When the Topo Map Overlay is toggled off, all topographic
color features are removed.
8.1.1.3 Airways
The Airways option allows you to select the airways that are shown on the
Map page. All, Low only, and High only Airways may be selected. When Off is
selected, airways will not be shown.
1. While viewing the Map Menu, touch Map Overlays key,
and then the Airways Map Overlay key to select the Airways
viewed. Selections are: Off, Low, High, and All.
2. Low Airways are shown as gray lines. High Airways are shown
as green lines.
190-01004-03 Rev. P
Figure 8-4 Topo Map Overlay Selections
Figure 8-5 Airways Map Overlay
GTN 625/635/650 Pilot's Guide
Topo Map Overlay On
Low Airway
High Airway
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8-5