AeroNav 900/880 Series Pilot’s Guide
89000039-010
Rev 1 May 2019 Map Subsystem 4-61
CHART EXTENT BOX
A green chart extent box is drawn separately on the map and
represents the geographic boundaries of an instrument approach
plate associated with a FMS destination. When the ownship symbol
crosses the boundary of the chart extent box, this is a good time to
switch over to the CHART tab.
Close Up of Chart Extent Box