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TUNE 3/4 (Page 3 of 4) NAV
Pressing the TUNE Key again will display this page and the following
information may be observed.
NAV 1 or NAV 2:
The station identifier to which the respective NAV receiver is tuned.
(KEY) will be displayed when the frequency or identifier of the station
has been entered using the CDU keyboard.
FREQ:
The frequency currently tuned and displayed on the respective con-
trol head. (MAN) in this field
indicates the frequency was
manually entered via the
control head. The field may
also show (KEY) if the ident
is unknown and the frequen-
cy was tuned via the CDU
keyboard. (KEY) will appear
in the NAV 1 or NAV 2 field if
the IDENT is known. No
annunciation in this field indi-
cates the VPU is automati-
cally tuning the NAV radio.
(Figure 2-67)
RANGE:
The range in nautical miles and tenths from aircraft present position
to the DME. (Figure 2-67) The station identifier can also appear in the
field between the range and range value field if the control head is
placed in the DME HOLD mode. NO ID is displayed in this field if the
identifier of the held station is unknown.
BRG:
The bearing in whole degrees from aircraft present position to the
VOR. (Figure 2-67)
Page Display Definitions
2-56
GNS-XL Flight Management System
Rev. 0
Oct/96
NAV 1 SGF
FREQ (MAN) 116.90
RANGE 105.0
BRG 350
NAV 2 ARG
FREQ (MAN) 114.50
RANGE 109.2
BRG 071
TUNE 3/4
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Figure 2-67