TM 1-1510-225-10
3B-17
(5) No wind text label.
(6) No off the display heading readout or
pointer for the heading bug.
In extreme pitch attitudes, the presentation
reverts to the normal excessive attitude display that is
a modified full ADI display.
3B-16. ELECTRONIC
HORIZONTAL
SITUATION
INDICATOR.
a. Description.
The
Electronic
Horizontal
Situation Indicator (EHSI) is located on the instrument
panel directly below each pilot and copilot’s EADI. It is
physically identical to the EADI, except it is configured
as an EHSI. Flight data information is electronically
displayed on both EHSI's. Refer to Figure 3B-8.
b. Power. Twenty-eight Vdc power is provided
to each EHSI through separate 7–1/2 ampere circuit
breakers labeled EHSI and located on the right side
circuit breaker panel under the NO. 1 and NO. 2 FLT
DSPL SYS.
27
28
1. Course Readout / Label
2. FMS Message Alert
3. FMS Heading Bug
4. Course Deviation Scale
5. Vertical Deviation Scale
6. Vertical Deviation Pointer
7. Lateral Deviation Bar
8. Course Source
9. FMS Flight Modes
10. Selectable Nav Date
11. Course Pointer
12. Wind Direction Degrees, Velocity, Knots
13. Compass Rose
14. Bearing Pointer
15. Compass Benchmarks
16. Distance of Bearing Source
17. Bearing Source
18. Distance to Course Source
19. Free Format Line (ARC-210 Freq)
20. Digital HDG Bug Readout
21. Heading Bug
22. Track Indicator
23. Digital Heading Readout
24. DR or RAIM Alert
25. FMS OFST
26. Wind Pointer
27. TO / FROM Indicator
28. Miniature Aircraft
Figure 3B-8. Electronic Horizontal Situation Indicator
