2. K
(2) (b) Navigation Display
MLS has available both active and preview modes, and
selected on the display controller NAV page.
~ Active Mode (Figure 253.8)
s
When displayed as the active nav source MLS
will be familiar
from
ILS usage. AZ will be displayed in white at the top
left of the ND, with the numeric display below it in green.
Unlike
ILS or VOR which use the course knob to set desired
course, the desired azimuth is set on the MLS control head
or is uplinked from the ground station.
The course pointer
and deviation bar will also be in green.
As with the PFD
annunciation, the active nav source displayed in the top
riqht hand corner is white unless the pilot and copilot
seiect the same source then it will be”amber. “
The vertical deviation indicator functions as with ~
is green and is labeled P for path in glidepath.
DME is in the top right corner and is displayed with
The distance readout will be dashed if DME is unavai”
Due to DME sharinq scheme the DME can be unavailable
LS but
MLS.
able.
to the
MLS .
As the G-IV-is configured for front azimuth approaches
only there is no need for a TO/FROM indicator.
Preview Mode (Figure 253.9)
With MLS, preview mode works very similiary to
ILS preview
with appropriate annunciation changes. MLS azimuth, DME,
and
source are displayed in a box in the lower portion of
the display. Deviation information will be displayed in the
preview ghost display in addition to the active source.
Again DME will be unavailable if NAV
is the active source.
22-14-00
Page 298.36.15
Apr 15/93
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