BendixKing SG 465 System EFS 50 - Manual (Page 80)

EHSI Displays
4.1.14 Issued 4/95 SW 06/07/08/11
the selected primary NAV sensor
is LNAV or en route RNAV the
inbound “TO” course line is cyan
(green in approach mode). Any
time the cross-side sensor is
selected as the primary NAV
sensor the inbound “TO” course
line is yellow.
If the primary NAV sensor dis-
tance or bearing information
becomes invalid the NAV symbol
and course line will be removed.
“NO MAP” will be displayed to
alert the pilot that insufficient data
is present to calculate and plot
the primary NAV sensor map.
“NO MAP” will also be displayed
if the selected primary NAV sen-
sor, (e.g. ILS, ADF), does not
provide distance and bearing
information. The lateral deviation
scale will remain as long as valid
bearing or deviation information
is present.
MAP COURSE DEVIATION
INDICATOR
A stationary white scale along
the bottom center of the display
provides reference for the course
deviation bar to indicate the posi-
tion of the aircraft in relation to
the selected navigation course.
This course scale provides a
conventional CDI (course devia-
tion indicator) presentation.
When LOC is selected while in a
map mode, Back Course annun-
ciation and CDI needle reversal
is provided when the selected
course is 105 degrees from the
aircraft heading (results in a fly to
situation). “BC”, in green, (yellow
“BC” if cross-side sensor is
selected) is annunciated left of
center on the lateral deviation.
TO/FROM
To the right of the alphanumeric
Course Select a white “TO” or
“FR” will replace the standard
EHSI TO/FROM pointer when in
non-ILS map modes.
BEARING POINTER
While in the map modes stan-
dard EHSI bearing pointers are
displayed when the selected
bearing source does not have
distance associated with it or
when the distance is greater than
the selected map distance. Once
the bearing source falls within
display distance the bearing
pointer is removed and the asso-
ciated map symbol is displayed.
The #1 system map symbol will
be displayed in light blue and the
#2 will be displayed in magenta
as are the standard bearing
pointers.
If bearing or distance information
becomes invalid, the map symbol
will be removed. If only the dis-
tance information becomes
invalid, the map symbol will be
removed and replaced with the
standard bearing pointer.
Note: See BEARING POINT-
ER, under STANDARD EHSI
DISPLAYS in this section for
details on the display of Mag-