4.15
GNC 250/250XL COMM/GPS
De tailed op er a tion is de scribed in the GARMIN GNC-250 Pi lot’s
Guide (Garmin P/N 190-00067-50, Rev. A or later) or GARMIN
GNC-250XL Pi lot’s Guide (Garmin P/N 190-00067-60, Rev. A or
later), which must be im me di ately avail able to the flight crew. The
GNC 250/250XL dis play top line is the
ACTV
(ac tive) and
STBY
(standby) COMM fre quen cies, and the lower three lines are the
GPS dis play. This GPS is for VFR use only.
This COMM works as soon as the
OFF
/ON/Vol ume con trol knob
is turned ON; right be side this knob is the
SQ
uelch con trol key...
you can press it for MAX I MUM re ceiver sen si tiv ity. The dou ble
ended ar row key (above the
CRSR
cur sor key) is used to
trade the
ACTV
(ac tive) and
STBY
(standby) fre quen cies. Only
the
STBY
fre quency may be changed, by the knobs be side the
CRSR
key, and only when the
CRSR
key has been pressed the
cor rect num ber of times to high light the
STBY
fre quency. Pressing
the
dou ble ar row key for more than two sec onds
will
al ways
tune the
ac tive
fre quency to
121.50
mhz (
emer gency
). A “TX”
will show up to the right of the ac tive fre quency, dur ing trans mit.
The GNC 250/250XL will not trans mit con tin u ously for lon ger
than 35 sec onds, even with a stuck mic key.
IF there is a flash ing light be side the
MSG
key, and / or the in stru -
ment panel mounted “GPS MES SAGE ” light is on, press the GNC
250/250XL
MSG
(mes sage) key once, to read the mes sage, and
again, to re turn to the pre vi ous dis play.
ENT
er = “yes” to “
OK
?”
Press the
D
ar row “di rect to” key and use the right side knob (and
ring) to spell out a cho sen way point (re mem ber that ICAO says to
start USA
all let ter
air port iden ti fi ers with “K”); then, press
ENT
twice, to nav i gate di rectly there. Use
CRSR
and ring knob to high -
light what you want to change.
ENT
will trans fer a
high lighted
fre quency
to
STBY
. Press
NRST
(near est air port, etc.) key and
twist knobs to get quick se lec tions.
D
ar row and
ENT
takes you
there. See GNC 250 or GNC 250XL Pi lot’s Guide for more in -
struc tions.
GNC 250 COMM/GPS
SCHWEIZER MODEL 269C-1 HELICOPTER
CSP-C1-1A
32
FAA Approved: 03 Oct 1995
Revised: 09 Jan 1998
