BendixKing SG 465 System EFS 50 - Manual (Page 72)

EHSI Displays
4.1.6 Issued 4/95 SW 06/07/08/11
in the lower left corner below the
NAV 1 source annunciator. The
readout for NAV 2 (the double-
bar bearing pointer) is in the
lower right corner below the NAV
2 source annunciator.
These readouts show distance
(in nautical miles) to the selected
station when in VOR, TACAN,
ILS or MLS mode. When in
LNAV or RNAV mode, distance
to the waypoint is shown.
Each of these three distance
readouts is displayed in the same
color as the source annunciator
and pointer with which it is asso-
ciated.
The EFS 50 will display ground
speed up to 999 KTS, Time-To-
Station up to 511 minutes, or 8
hours, 31 minutes (8:31) with
software 08, and distance up to
4,095 nautical miles. In most
cases, the DME will be the limit-
ing factor in displayable data.
When DME HOLD is selected,
the distance displayed is white in
color. “H” follows GS field in
upper right corner. During HOLD
the displayed distance probably
will not be associated with the
selected bearing pointer. For
more information on DME HOLD,
refer to the DME HOLD section
which follows.
❏ The bearing sensor selection
function offers an optional DME-
only display feature in the cycle.
If the DME-only option was
selected at the time of installation
and certification, DME #1 and #2
information may be independent-
ly selected for display in the bear-
ing pointer information area with-
out displaying a bearing pointer.
Software 07 added the option to
configure the DME annunciation
in the bearing pointer field as
either:
❏ DME
❏ NAV
To annunciate operational Dis-
tance Measuring Equipment
(including those associated with
LNAV) which has not acquired
lock on to the selected station,
dashes of the same color as the
sensor annunciator will be placed
in the distance data field. If the
equipment has failed or informa-
tion is not being received by the
EFS 50, the dashes will be Red.
In both cases the NM annuncia-
tion will remain and the KT/TTS
will be removed if normally dis-
played.
DUAL MULTI CHANNEL
DME INSTALLATIONS
❏ Software 07 incorporated the
capability to interface with a vari-
ety of multi channel DME,
VOR/ILS and MLS installations,
and perform automatic reversion
in the event of a failed DME sen-
sor in certain installations.
For those installations supporting
the automatic reversionary mode,
the system can experience a
DME failure without the pilot or
copilot loosing the normal dis-
tance presentation. For exam-
ple, if the number one DME,