Piper ARCHER III Pilot Operating Handbook page 415

PA-28-181, ARCHER III
SECTION 4 - NORMAL PROCEDURES
Refer to the 400W Series unit Pilot's Guide defined in Section 2 - Limitations
of this supplement for normal operating procedures. This includes all GPS
operations, VHF COM and NAV, and Multi-Function Display (optional)
information.
Although intuitive and user friendly, the GNS430W requires a reasonable
degree of familiarity to prevent operations without becoming too engrossed at
the expense of basic instrument flying in IMC and basic see-and-avoid in
VMC. Pilot workload will be higher for pilots with limited familiarity in using
the unit in an IFR environment, particularly without the autopilot engaged.
Garmin provides excellent training tools with the Pilot's Guide and PC based
simulator. Pilots should take full advantage of these training tools to
enhance system familiarization. Use of an autopilot is strongly
encouraged when using the GNS430W in IMC conditions.
Approaches with Vertical Guidance
The GNS430W supports three types of GPS approaches with vertical
guidance: LPV approaches, LNAV/VNAV (annunciated as L/VNAV)
approaches, and LNAV approaches with advisory vertical guidance
(annunciated as LNAV+V). For LNAV approaches with advisory vertical
guidance, the GNS430W will annunciate LNAV+V indicating vertical
guidance is available. LNAV minimums will be controlling in this case.
If flying an LPV or LNAV/VNAV approach, be
prepared to fly the LNAV only approach prior to
reaching the final approach fix (FAF). If the GPS
integrity is not within vertical approach limits, the
system will flag the vertical guidance. This may be
annunciated by a downgrade to LNAV message.
For additional information on approaches with vertical guidance, refer to the
400W Series unit Pilot's Guide.
ISSUED: JULY 12, 1995
REVISED: JULY 29, 2010
NOTE
SECTION 9
SUPPLEMENT 27
REPORT: VB-1611
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