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What happens when I select an approach? Can a route be stored with an approach, SID or
STAR?
Whenever you load an approach or STAR into the active route, the arrival airport is moved, and a set
of approach or arrival waypoints is inserted. If a SID is loaded into the active route, the SID waypoints
will be inserted following the departure airport in the active route. Note: these modifications only apply
to the active route, and will not affect the corresponding stored route (if you have activated one). Routes
can be stored with an approach, SID or STAR. Keep in mind that the active route is erased when the unit
is turned off and overwritten when another route is activated.
When storing routes with an approach, SID or STAR, the GPS will use the waypoint information from
the current database to define the waypoints. If the database is changed or updated, the GNC 300 will
automatically update the information if the procedure name has not changed. If an approach, SID or
STAR procedure is no longer available, the route will become locked until the procedure is deleted from
the route or the correct database is installed.
Can I file slant Romeo ‘/R’ using my GPS?
Yes, you may file your flight plan as /R if your GNC 300 is a certified A1 or A2 installation. If you are
flying enroute, you may fly /R with an expired database only after you have verified all route waypoints.
Non-precision approaches may not be flown with an expired database. See your approved Airplane
Flight Manual Supplement for more information.
How do I fly the GPS with an autopilot and DG heading bug?
If you don’t have an HSI, make your course selections on the OBS and the DG heading bug.
What does the GPS APR switch do? What is ‘arming’ an approach?
The GNC 300 will automatically arm the selected approach when you are 30 nm from the arrival air-
port. The GPS APR switch is used to manually disarm and re-arm the approach. The GPS APR switch
also provides you with the capability to quickly deactivate the approach and return the CDI scaling to the
1 nm scale in the event of a missed approach. For more on the GPS APR switch, see Section 6.
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