GARMIN International, Inc.
9875 Widmer Road
Lenexa, KS 66215 U.S.A.
FAA APPROVED AIRPLANE FLIGHT MANUAL SUPPLEMENT
GARMIN GNC300 VHF COMMUNICATION TRANSCEIVER / GPS RECEIVER
FAA APPROVED 190-00067-03 Rev. A
DATE: 10/16/95 Page 7 of 16
2. If "RAIM POSITION WARN" message is displayed the system will flag and no
longer provide navigational guidance. The crew should revert to an alternate
means of navigation.
3. If "RAIM NOT AVAILABLE" message is displayed in the enroute, terminal, or
initial approach phase of flight, continue to navigate using the GPS equipment or
revert to an alternate means of navigation appropriate to the route and phase of
flight. When continuing to use GPS navigation, position must be verified every
15 minutes using another IFR-approved navigation system.
4. If "RAIM NOT AVAILABLE" message is displayed while on the final
approach segment, navigation will continue for up to 5 minutes with approach
CDI sensitivity (0.3 nautical mile). After 5 minutes the system will flag and no
longer provide course guidance with approach sensitivity. Missed approach
course guidance may still be available with 1 nautical mile CDI sensitivity by
executing the missed approach operation described in Section IV paragraph 2(f)
of this Airplane Flight Manual Supplement.
5. If external power to the GNC300 is lost, the system will automatically revert to
its remote battery, and navigation will continue. VHF Communications will be
available at reduced transmitter power output. A message will be presented to
the pilot that the unit will turn off in XX seconds unless a key is pressed to
continue navigation (XX is a countdown from 30). If external power is lost, the
pilot’s HSI display will automatically revert to NAV1 data. When the GNC300
is operating on its remote battery, the display will automatically blank to
conserve power after the time interval setting on the SETUP menu. Activating
any control on the GNC300 automatically re-enables the display for the set time-
out period.
6. In an in-flight emergency, depressing and holding the Comm transfer button for
2 seconds will select the emergency frequency of 121.500 Mhz into the "Active"
frequency window.
