Cessna 172R Operating Handbook page 464

SECTION 9 SUPPLEMENTS
-
SUPPLEMENT 19
GLOBAL POSITIONING SYSTEM (IFR)
The KLN 94 GPS (Global Positioning System) is a three-
dimensional precision navigation system based on 24 earth orbiting
satellites. Receiver Autonomous Integrity Monitoring (RAIM) is a
function that every IFR-certified GPS receiver
perform to assure position accuracy. RAIM is available when 5 or
more of these satellites are in view, or
barometrically corrected altitude input from the airplane's altimeter
is made. Annunciation is provided if there are not enough satellites
assure position integrity.
in view to
Operational guidance for the KLN 94 GPS Navigation System is
provided with the Bendix/King KLN
the airplane). This Pilot's Guide should be thoroughly studied and
IVFR
operations conducted so that you are totally familiar with GPS
Inavigation
before actually using this equipment in IFR conditions.
S19-4
FAA APPROVED
-
SUPPLEMENT
BENDIX/KING KLN 94
SECTION 1
GENERAL
must
satellites are in view and a
4
Pilot's Guide (supplied with
94
CESSNA
MODEL 172R
continuously
Dec 30/00