TM 1-1510-218-10
3A-20
1. Heading Marker
2. COMPASS Flag
3. Lubber Line
4. Course Arrow
5. Compass Card
6. COURSE Indicator
7. VOR LOC Flag
8. COURSE Control
9. Course Deviation Bar
10. To-From Arrow
11. HDG Control
12. GS Flag
13. Glideslope Pointer
Figure 3A-9. Copilot’s Horizontal Situation Indicator
(10) To-From Arrow. Indicates direction
toward the VOR station along the course selected by
the COURSE knob.
(11) HDG Knob. Used to select desired
heading.
(12) GS Flag. Covers glideslope pointer
when not receiving glideslope information.
(13) Glideslope Pointer. Displays deviation
from correct glideslope during ILS approach.
3A-17. PILOT’S
HORIZON
REFERENCE
INDICATOR.
a. Description.
The
horizon
reference
indicator is the pilot's basic attitude horizon indicator
and the attitude direction instrument for the flight
director system. Refer to Figure 3A-10.
b. Controls and Functions.
(1) Crossed Needles. Displays computed
steering commands.
(2) Bank Angle Pointer. Indicates aircraft
bank angle.
(3) Bank
Angle
Index.
Reference
indicating zero-degree bank.
(4) Bank
Angle
Scale.
Allows
measurement of aircraft bank angle from 0 to 60°.
(5) Horizon Line. Affixed to sphere,
remains parallel to the earth's horizon at all times.
(6) CMPTR Flag. Presence indicates a
malfunction within the autopilot computer.
