Cessna 172P - Page 265

PILOT'S
OPERATING HANDBOOK
SUPPLEMENT
104
DME
(TYPE
4õ1)
4. NAV MODE SELECTOR
SWITCH
-
Appliea
powor
to the DME and
selects
DME
operatlng modes as follows:
OFF: Turns the DME OFF.
NAV 1: Selects DME operation with
No. 1
VHF
naviga,tlon eet;
enebles
channel solectlon by Nav
1 frequonoy selector swltchee.
HOLDì Selects DME momory
clrcuitl DME remalne
ohanneled to
stetion
to
which it was lost channeled whon
HOLD wes selected
and will continue
to
display information rtilative to this
oha4nel. Allows
both the Nav
I and
Nav 2 navigation
receivers to
be
set to new
operational frequencies
without a,ffectlng the
previously
selected
DME operatlon.
CAUTION
In the
Hold
mode thore is
no annunci¿tion
of
the
VOR/DME
station
frequency. However,
an
annunciator
labeled
"HLD"
will illuminate
on
the DME
to
flag the
pilot
tha,t the DME
is in the
Hold mode'
NAV 2: Selects DME
oper&tion
with No'
2 VHF
na,vigation seti
eneblos
channel Bel€ction by
Nav 2 frequency
aelector
swftches.
RNAV:
Selects e,roa, navigetion
operetion,
Brightnoss
of this
switch is controllod by the
radio light dimming
rheosta,t.
5. HOLD
ANNUNCIATOR
(HLD)
-
Illuminates
a,mb€r to indicate HOLD
mode
is
selected.
6, WAYPOINT ANNUNCIATOR
(WPT)
-
Illuminates
ember
to indicate RNAV
mode is selected.
(Annunciator
will not illumlna,te when DME is installed
wlthout
RNAV,)
Figure 1. IND-4ã0C
Indicator
(Sheet
2 of 2)
3
30
May 1980