T-45A UJPT & E2-C2 INav-03
Use and Operation of TACAN, VOR, VOR/DME
d. Voice communications (receive only)
Fig 5: COMM/NAV
Transfer Panel
(1) TACAN: none
(2) VOR/DME: possible, depending upon facilities
Fig 6: Communication
Control Panel
e. Errors
(1) TACAN: locks on in increments of 40 degrees from actual
azimuth
(2) VOR/DME: N/A
II. TACAN
Fig 7: TACAN Control
Panel
A. Location and use of TACAN equipment controls and indicators for
tuning/identifying 2.7.5.1.1.1
1. COMM/NAV control transfer panel: CDI TACAN switch/light
provides switching logic to route navigational information to the HSI
CDI
2. Communication control panel: TACAN toggle switch provides
routing and volume control of Morse code identifier through
intercommunication system (ICS) to pilot’s headset
3. TACAN control panel
a. Power switch controls power to system. Allow 5-second
warmup
b. Option select switch
(1) Position X or Y allows normal selection of a TACAN
channel for bearing and DME information for that X or Y
mode only
(2) Position XA/A, commonly referred to as the air-to-air
mode, permits 2-5 aircraft to receive DME only from one
aircraft with the TACAN set 63 channels apart
c.
Test button initiates system BIT
(1) Select TACAN position on CDI switch
(2) Set 180 on HSI course selector window
(3) Press and hold TEST button for a minimum of 5 seconds
(6-99) Original
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