Section 925
GARMIN GNC 420W
925 - 4
Page Date: 31. March 2009
Pilot´s Operating Handbook
EXTRA 300L
of five degrees. The GNC 420W also has the ability to predict RAIM availability at any waypoint in
the database if WAAS corrections are expected to be absent or disabled. This AFMS does not
constitute an operational approval for Oceanic or Remote area operations. Additional equipment
installations or operational approvals may be required.
a) Oceanic navigation requires an additional approved long range oceanic and/or remote area
navigation system with independent display, sensors, antenna, and power source.
b) Operations approval
may
be granted for the use of the GNC 420W RAIM prediction function in
lieu of the Prediction Program for operators requiring this capability. Refer to your appropriate
civil aviation authorities for these authorizations.
925.2
LIMITATIONS
The system must utilize main software version 3.00 and GPS software version 3.0 or later FAA
approved versions. A valid and compatible database must be installed and contain current data.
The functionality of the GNC 420W may be used for VFR navigation purposes only when a reversion
to traditional navigation (map, magnetic compass) is possible at any time.
925.2.1
PLACARDS
(In the clear view of the pilot)
(Next to the GNC 420W circuit breaker)
925.3
EMERGENCY/ABNORMAL PROCEDURES
925.3.1
EMERGENCY PROCEDURES
Not affected.
925.3.2
ABNORMAL PROCEDURES
GPS NAVIGATION INFORMATION NOT AVAILABLE OR INVALID
If GNC 420W GPS navigation information is not available or invalid, utilize remaining operational
navigation equipment as appropriate.
GARMIN GNC420W GPS
limited to VFR use only
Summary of Contents for 300L
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