Airplane Flight Manual Supplement

190-00356-03 Rev. E AFMS, Garmin GNS 4XXW GPS/SBAS System
Page 10 of 21 FAA APPROVED
Both Garmin GPS navigation receivers must be operating and
providing GPS navigation guidance for operations requiring RNP-4
performance.
North Atlantic (NAT) Minimum Navigational Performance
Specifications (MNPS) Airspace operations per AC 91-49 and AC 120-
33 require both GPS/SBAS receivers to be operating and receiving
usable signals except for routes requiring only one Long Range
Navigation sensor. Each display computes an independent navigation
solution based on its internal GPS receiver.
Whenever possible, RNP and RNAV routes including Standard Instrument
Departures (SIDs), and Standard Terminal Arrival (STAR), routes should be
loaded into the flight plan from the database in their entirety, rather than loading
route waypoints from the database into the flight plan individually. Selecting
and inserting individual named fixes from the database is permitted, provided all
fixes along the published route to be flown are inserted. Manual entry of
waypoints using latitude/longitude or place/bearing is prohibited.
NOTE
If flight plan information is imported from a
portable electronic device utilizing the Flight Stream
210, all waypoints and flight plan information must
be verified by the crew.
It is not acceptable to flight plan a required alternate airport based on
RNAV(GPS) LP/LPV or LNAV/VNAV approach minimums. The required
alternate airport must be flight planned using an LNAV approach minimums or
available ground-based approach aid.
Navigation information is referenced to the WGS-84 reference system, and
should only be used where the Aeronautical Information Publication (including
electronic data and aeronautical charts) conform to WGS-84 or equivalent.
2.6 Approaches
 Instrument approaches using GPS guidance may only be conducted
when the GNS is operating in the approach mode. (LNAV,
LNAV+V, L/VNAV, LPV, LP, or LP +V)
NOTE
Advisory vertical guidance deviation is provided
when the GNS annunciates LNAV+V or LP +V. The
controlling minimums remain LNAV or LP even
when advisory vertical guidance is provided.
Advisory vertical guidance information displayed on
the VDI in this mode is only an aid to help flight
crews comply with altitude restrictions. When using
advisory vertical guidance, the flight crew must use
the primary barometric altimeter to ensure
compliance with all altitude restrictions in