BendixKing SG 465 System EFS 50 - Manual (Page 71)

EHSI Displays
4.1.5 Issued 4/95 SW 06/07/08/11
selected navigation or localizer
course.
Note: The Lateral Course Devi-
ation Bar may not be used as
the primary means of naviga-
tion during an ADF approach.
The D-bar may be used to
supplement the bearing point-
er which is used as the prima-
ry navigation source.
If invalid or failed primary NAV
sensor data is received the
course deviation bar and scale
are removed and a RED X
annunciated.
Beginning with software 11, the
deviation bar and scale are
decluttered without displaying a
RED X when the deviation infor-
mation is provided in ARINC 429
format with a status of NO COM-
PUTED DATA (NCD). The RED
X will still be displayed if the data
is missing or invalid.
TO/FROM INDICATOR
A white filled triangle near the
center of the EHSI pointing
toward the head (“TO”) or tail
(“FROM”) of the course pointer
indicates whether the selected
course is TO or FROM the sta-
tion or waypoint. The TO/FROM
annunciator is not displayed dur-
ing ILS/MLS operation or when
an invalid NAV signal is received.
DISTANCE,
GROUNDSPEED and
TIME-TO-STATION
The EFS 50 provides up to three
distance displays — one for
each selected navigation source
(if distance information is avail-
able from that source).
The readout for the primary NAV
source is shown in the upper
right corner. This readout will
also show aircraft groundspeed
or Time-to-Station/Waypoint.
Both are displayed simultaneous-
ly with software 08.
The distance readout for NAV 1
(the single-bar bearing pointer) is
ANGULAR DEV
(DEGREES) MODE LINEAR DEV
(MILES)
LNAV or RNAV APPR
VOR/TAC
ADF
LNAV or RNAV
1 dot 5.0 deg
2 dots 10.0 deg
1 dot 7.5 deg
2 dots 15.0 deg
1 dot 2.5 NM
2 dots 5.0 NM
1 dot 0.625 NM
2 dots 1.25 NM
LATERAL DEVIATION SCALE
Aircraft displacement