II Morrow Inc. 920 GPS - Manual (Page 70)

Entering
GPS
Approaches GPS Approaches and Extended Runway
Centerlines are available with software
version 3.0 or greater. This feature allows
pilots to select an approach and automatically
insert approach waypoints into the route.
GPS Overlay Approaches
Software version 3.0 or greater includes all
published GPS overlay approaches in the U.S.
and Canada. These approaches are designed to
fit over existing NDB and VOR non-precision
approaches and allow you to monitor your
progress
while flying a non-precision
approach using your approved IFR equipment.
The GPS overlay approaches MUST NOT be
flown using the Apollo handheld GPS alone.
You MUST use your IFR approved sensors
(NDB or VOR) and charts to fly the approach.
Approach Waypoint Identifiers
The approaches use published waypoints if
available, but when published waypoints are
not available, special waypoints and identifiers
are created. These created names include a
two character prefix usually followed by the
runway number (e.g., CF23L). If the approach
does not apply to a particular runway, then the
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