BendixKing SG 465 System EFS 40/50 - Manual (Page 99)

EHSI Displays
HEADING SELECT “BUG”
A notched heading bug is manu-
ally rotated around the compass
scale by the heading select knob
on the control panel. In the 360-
degree compass mode a full time
digital readout of the selected
heading is displayed below the
vertical deviation scale position.
In the ARC mode, a digital head-
ing readout is displayed when the
heading bug is not completely in
view. The digital readout will be
positioned just inside the com-
pass scale on the side nearest
the heading bug. Once set, the
heading bug rotates with the
compass card. The heading bug
is used to indicate desired head-
ing and provides selected head-
ing reference for autopilot steer-
i n g .
A RED X will be drawn through
the heading bug if there is a
heading select knob failure on
the EFS 40/50 control panel.
Software release 06 added the
options, selectable at the time of
installation and certification, to
select one of three heading bug
and digital readout color choices:
o
O r a n g e
o
C y a n
o
M a g e n t a
Prior to software 06, the heading
bug and selected heading read-
out are always orange. The
heading bug is not displayed in
MFD only installations. This
became an EFS system configu-
ration option with software 09.
COURSE SELECT
The CRS control knob rotates the
course pointer about the com-
pass scale and sets digital
course readout. Once set, the
course pointer rotates with the
compass card. The selected
course indicates desired naviga-
tion course to be flown. Depend-
ing on the LNAV (long range nav-
igation) installed, the course
pointer may automatically be
positioned to the DTK (desired
track) when LNAV is selected as
the primary sensor. When LNAV
is the selected sensor and DTK
is displayed, the EFS 4 0 / 5 0
course select knob is disabled.
In the upper left corner of the dis-
play, an alphanumeric readout
annunciates the letters CRS and
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.
N o t e : Desired track readout
(DTK) generated by an LNAV
sy stem replac es ( CRS) in
LNAV mode. Some LNAV
systems may display CRS or
DTK depending on the select -
ed mode. MLS may display
AZ (azimuth) or BAZ (back
azimuth) depending on the
selected mode.
Systems with Software release
05 retain (remember) the manu-
ally selected course, as set by
the CRS knob, when the selected
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Section 4.1mp 9/9/10 1:45 AM Page 4.1.4