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|  T-45C TS INav 03; ADV INav-01
Use and Operation of TACAN, VOR, VOR/DME
4. Horizontal situation indicator (HSI)
a. TACAN range counter
(1) Indicates line-of-sight (slant range) distance: maximum
999 (display limitation)
(2) TACAN data removed from display
(a) System power off
(b) Invalid or absent signal
b. TACAN bearing pointer (TACAN relative bearing pointer)
indicates magnetic bearing to a tuned and valid TACAN station
c.
CDI course line indicates up to 10 degrees of deviation left or
right from selected course
B. Tuning/identifying
1. Correct information 2.7.5.1.1.1.2
a. Find channel on approach plates/charts
b. Verify navigation control (FWD/AFT) in your cockpit
c.
Select TACAN steering (only if navigating by TACAN)
d. Verify TACAN control panel is on, and volume is turned all the
way up. Select channel on TACAN control panel
e. Select TACAN on communication control panel to route TACAN
identification signal to your headset
f.
Verify 3-letter Morse code identifier of selected station
Fig 8: HSI Display/TACAN
C. HSI indications
Operation
1. TACAN bearing pointer indicates magnetic bearing to station
2. TACAN data block indicates digital bearing, range and time to go
3. Course line indicates deviation from selected course
D. Erroneous information
1. Cone of confusion 2.7.5.1.1.2.3
a. HSI
Page 3-15
(2-02) Original
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