Garmin GTN 625, Flight Manual

Page: 20 / 49

AFMS, Garmin GTN GPS/SBAS System 190-01007-A2 Rev. 6
FAA APPROVED Page 13
If the navigation database cycle will change during flight, the flight crew must
ensure the accuracy of navigation data, including suitability of navigation
facilities used to define the routes and procedures for flight. If an amended chart
affecting navigation data is published for the procedure, the database must not
be used to conduct the procedure.
See Section 2.29 for limitations regarding database update procedures.
2.9 Ground Operations
Do not use SafeTaxi or ChartView functions as the basis for ground
maneuvering. SafeTaxi and ChartView functions do not comply with the
requirements of AC 20-159 and are not qualified to be used as an airport moving
map display (AMMD). SafeTaxi and ChartView are to be used by the flight
crew to orient themselves on the airport surface to improve flight crew
situational awareness during ground operations.
2.10 Approaches
a) Instrument approaches using GPS guidance may only be conducted when the
GTN is operating in the approach mode. (LNAV, LNAV +V, L/VNAV,
LPV, LP, or LP +V)
b) When conducting instrument approaches referenced to true North, the NAV
Angle on the System -Units page must be set to True .
c) The navigation equipment required to join and fly an instrument approach
procedure is indicated by the title of the procedure and notes on the IAP
chart. Navigating the final approach segment (that segment from the final
approach fix to the missed approach point) of an ILS, LOC, LOC-BC, LDA,
SDF, MLS, VOR, TACAN approach, or any other type of approach not
approved for GPS, is not authorized with GPS navigation guidance. GPS
guidance can only be used for approach procedures with GPS or RNAV in
the procedure title. When using the Garmin VOR/LOC/GS receivers to fly
the final approach segment, VOR/LOC/GS navigation data must be selected
and presented on the CDI of the pilot flying.
d) Advisory vertical guidance deviation is provided when the GTN annunciates
LNAV + V or LP +V. 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.
e) Not all published Instrument Approach Procedures (IAP) are in the
navigation database. Flight crews planning to fly an RNAV instrument
approach must ensure that the navigation database contains the planned
RNAV Instrument Approach Procedure and that approach procedure must be
loaded from the navigation database into the GTN system flight plan by its
name. Pilots are prohibited from flying any approach path that contains
manually entered waypoints.
f) IFR approaches are prohibited whenever any physical or visual obstruction
(such as a throw-over yoke) restricts pilot view or access to the GTN and/or
the CDI.