BendixKing SG 465 System EFS 50 - Manual (Page 74)

EHSI Displays
4.1.8 Issued 4/95 SW 06/07/08/11
and the DME assigned to that
side is placed in HOLD, the large
ADF annunciation will reduce in
size as the white held DME
range information and orange “H”
is displayed below it.
Please note that the range infor-
mation being displayed is not ref-
erenced to the ADF, but to what-
ever channel the DME was tuned
to when the pilot placed it in
HOLD.
DME HOLD will not function
when an LNAV or RNAV is the
selected sensor, and is not
allowed when MLS is the select-
ed primary sensor. The associat-
ed distance field is used to dis-
play waypoint distance or
distance to the MLS station.
Note: It is important to remem-
ber that once a DME is placed
in HOLD it probably is not ref-
erenced to any VOR/ILS sen-
sor being displayed. Hold
removes the dependency of
the DME to the VOR/ILS con-
trol head. It is, therefore, up to
the pilot to recognize that
when the DME distance infor-
mation color changes to white
and the orange “H” is dis-
played, the distance presented
is probably not paired to the
VOR/ILS control head fre-
quency.
Hold is a pilot selected mode of
operation for the DME. Once the
pilot selects hold, it is the pilot’s
responsibility to remember where
the DME is HELD.
DME and DME HOLD operation
may vary greatly from installation
to installation. This variation in
operation is directly dependent
upon the number and types of
DME installed. To best under-
stand how these two functions
work in a particular installation,
refer to the aircraft flight manual
supplement or contact the
installing agency for a detailed
explanation.
BEARING POINTER
The rotating light blue single bar
#1 Bearing Pointer points in the
direction of the selected bearing
sensor ground station (or way-
point when in the LNAV or RNAV
mode).
The rotating magenta double bar
#2 Bearing Pointer performs the
identical function for #2 bearing
sensor systems.
If the selected bearing sensor is
not receiving valid data, the Bear-
ing pointer assigned to that bear-
ing source will not be displayed
and a RED X will be drawn
through the selected bearing
source annunciator at the bottom
left or right of the display. The
associated distance data will
remain displayed if valid.
If the compass card is MAG
(magnetic) referenced, TRUE
bearing sensor pointers, such as
LNAV, may be displayed if valid
mag var (magnetic variation) is
provided to the EFS 50. In this
case, the TRUE sourced bearing
pointer information will be con-