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Section 5 Menu Functions and Procedures
Rev A Apr 2019
IDU-450 EFIS Software Version 8.0H (Rotorcraft)
5-31
2) Push
to view information.
5.10. Omnibearing Selector (OBS) Menu
R3
Set desired OBS
1
OBS SYNC
OBS:AUTO
(d)
L2
L3
NAV: FMS
NAV: VLOC1
L4
NAV: VLOC2
Select HSI display navigation source
* Current source
Scroll – Change OBS in 1° increments
Push – Set selected OBS
Push – Set OBS automatically
through active flight plan
R4
OBS AUTO
(c)
Synchronize OBS setting to inbound
course or aircraft heading
Toggle to AUTO mode
(c) Shown if HSI source is
FMS and OBS is manual
(d) Shown if HSI source is
FMS and OBS is auto
OBS MAN
(d)
Toggle to MANUAL mode
R2
RNP..
Set desired RNP
1
RNP: AUTO
R4
RNP AUTO
RNP MAN
Toggle to AUTO RNP
Toggle to MANUAL RNP
Scroll – Change MANUAL RNP
Push – Set selected MANUAL RNP
Push – Set AUTO RNP mode
OBS
Figure 5-12: Omnibearing Selector (OBS) Menu
OBS menu allows the pilot to control the omnibearing selector for showing
course deviations. Press
FMS (L2)
to specify a manual or automatic OBS
setting in which the active OBS is controlled by the active flight plan. OBS
for VLOC1 allows the pilot to specify the active OBS setting for the VLOC1
navigation function. OBS for VLOC2 allows the pilot to specify the active
OBS setting for the VLOC2 navigation function. Manual
FMS
,
VLOC1
, and
VLOC2
OBS
settings are settable in increments of 1°.
OBS
SYNC (R3)
synchronizes the manual
FMS
,
VLOC1
, or
VLOC2
OBS
settings
(depending upon HSI source) to the inbound course or, if the inbound
course cannot be determined, to aircraft heading. When HSI source is
FMS,
OBS AUTO/OBS MAN
(R4)
toggles between automatic and manual
OBS settings.
NOTE:
If a true north mode discrete input is configured, the OBS menu allows the
pilot to toggle between
TRUE NORTH
and
MAG NORTH
modes.