BendixKing SG 465 System EFS 50 - Manual (Page 70)

EHSI Displays
4.1.4 Issued 4/95 SW 06/07/08/11
indicates the selected navigation
course in degrees. When in a
NAV map display mode, the
course pointer will not be dis-
played, the alphanumeric readout
will be the only reference for the
selected course.
Note: Desired track readout
(DTK) generated by an LNAV
system replaces (CRS) in
LNAV mode. Some LNAV sys-
tems may display CRS or DTK
depending on the selected
mode. MLS may display AZ
(azimuth) or BAZ (back
azimuth) depending on the
selected mode.
The system retains (remembers)
the manually selected course, as
set by the CRS knob, when the
selected primary NAV sensor is
sequenced through the LNAV
position.
This allows an ILS inbound
course to be selected prior to the
completion of an LNAV flight leg
that will be followed by an ILS
approach.
In the event of a heading failure,
the course pointer head and tail
are removed and the course
deviation scale is fixed in a
horizontal position, providing
standard course deviation infor-
mation (CDI) referenced to the
digital CRS selected. A RED X
will be drawn through the CRS
annunciation if there is a course
select knob failure. In the event
the selected course or desired
track received from the LNAV
becomes invalid, a RED X will be
drawn through the digital read-
out.
Note: The above heading fail-
ure mode does not apply when
ADF is the primary NAV sen-
sor. (ADF D-Bar is heading
dependent and is non-opera-
tional without valid heading.)
LATERAL COURSE
DEVIATION SCALE
The course deviation scale, two
white dots evenly spaced on both
sides of the symbolic aircraft,
provides a reference for the
course deviation bar to indicate
the center line of the selected
navigation or localizer course in
relation to the symbolic airplane.
The following represents the
deviation scale for different navi-
gation sources.
Note: Depending on the type of
LNAV installed, the Lateral
Deviation may be different.
Beginning with EFS software ver-
sion 11, variable scale factor
LNAV is added to the configura-
tion options. This allows the full
scale deviation to vary between
0.0567 and 128 NM. If variable
scale factor LNAV is configured
and unavailable to the EFS, the
lateral deviation scale will be
flagged.
LATERAL COURSE
DEVIATION BAR
The course deviation bar repre-
sents the center line of the