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Garmin G1000 Pilot’s Guide for Cessna Nav III190-00498-00 Rev. A

C-1

APPENDIX C

QUESTIONS & ANSWERS

This Appendix answers common questions regarding

G1000 system operational capabilities. If a particular

subject is not covered in this Appendix, the index may be

used to ﬁnd the appropriate section in this manual. If a

sufﬁcient answer is still not found, an authorized Garmin

dealer or contact Garmin directly (see Copyright page).

Garmin is dedicated to supporting its products and cus

tomers.

What is RAIM and how does it affect approach

operations?

RAIM is an acronym for Receiver Autonomous Integ-

rity Monitoring. RAIM is a GPS receiver function that per-

forms the following functions:

• Monitors and veriﬁes integrity and geometry of

tracked GPS satellites.

• Eliminates a corrupt satellite from the navigation

solution.

• Notiﬁes the pilot when satellite conditions do

not provide the necessary coverage to support a

certain phase of ﬂight.

• Predicts satellite coverage of a destination area to

determine whether the number of available satel-

lites is sufﬁcient to satisfy requirements.

For RAIM to work correctly, the GPS receiver must

track at least ﬁve (5) satellites. A minimum of six (6) sat

ellites is required to allow RAIM to eliminate a single cor-

rupt satellite from the navigation solution.

RAIM ensures that satellite geometry allows for a navi

gation solution calculation within a speciﬁed protection

limit (2.0 nm for oceanic and en route, 1.0 nm for ter-

minal, and 0.3 nm for non-precision approaches). The

G1000 system monitors RAIM and issues an alert mes-

sage when RAIM is not available (see Annunciation and

Alerts Pilot’s Guide). Without RAIM, GPS position accu-

racy cannot be monitored. If RAIM is not available when

crossing the FAF, the pilot must ﬂy the missed approach

procedure.

N OT E : I f R A IM is no t p r edi c t ed t o

be a va ila b le f o r the f ina l a ppr o ac h

course, the approach does not become

active, as indicated by the “RAIM not available

from FAF to MAP” message and the INTEG

annunciation ﬂagging.

Why are there not any approaches available for

a ﬂight plan?

Approaches are available for the ﬁnal destination air-

port in a ﬂight plan or as a direct-to (keep in mind that

some VOR/VORTAC identiﬁers are similar to airport iden-

tiﬁers). If a destination airport does not have a published

approach, the G1000 indicates “NONE” for the available

procedures.

What happens when an approach is selected?

Can a ﬂight plan with an approach, a departure,

or an arrival be stored?

When an approach, departure, or arrival is loaded into

the active ﬂight plan, a set of approach, departure, or ar-

rival waypoints is inserted into the ﬂight plan – along with

a header line showing the title of the selected instrument

procedure. The original enroute portion of the ﬂight plan

remains active, unless the instrument procedure is acti-

vated. This may be done either when the procedure is

loaded, or at a later time.

Flight plans can also be stored with an approach, a

departure, or an arrival. Note that the active ﬂight plan

is erased when the system is turned off. Also, the active

ﬂight plan is overwritten when another ﬂight plan is acti

vated. When storing ﬂight plans with an approach, a de-

parture, or an arrival, the G1000 uses the waypoint infor-

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