T-45C TS & ADV BIFP-07; IUT BIFP-02
TACAN and VOR Procedures
8.
Cone-of-confusion 2.7.5.1.1.2.3
Sg 1, fr 2g
a.
This cone exists in an expanding
horizontal dimension that starts
V
NAY
J T
E
I KE
T
N
A
Min.
DME
immediately above a TACAN station
HSI Indications:
- Bearing pointer searches
- CDI removed
TACAN Cone-of-Confusion
- Numeric bearing removed
(May vary 60-100)
b.
HSI TACAN bearing pointer will rotate
around the compass card in a search
Station passage:
- Minimum DME
mode while within the cone
TACAN CONE-OF-CONFUSION
c.
HSI TACAN CDI will be removed when
in the cone
d.
HSI digital TACAN bearing numbers
will be removed when in the cone
e.
TACAN holding fixes are always
Sg 1, fr 2h
defined with DME that is sufficiently
displaced from the cone, contrasted to
Operating
TACAN
VOR
characteristics
VOR holding fixes that are located
NO
Affected by
NO
weather
directly over VOR stations
YES
Emits 360 RDLS
YES
about station
Transmits voice
Voice
None
B.
VOR
Limited by line of
YES
YES
sight
1.
Unaffected by weather
Operates in
VHF 108.0 - 117.95 MHz
UHF 126
Channels
Provides
Magnetic bearing Magnetic bearing
slant range
2.
360 magnetic radials emitted from station
Identified by 3-
YES - and/or
YES - every
letter Morse code
recorded voice
35 seconds
TACAN-VOR COMPARISON
3.
Operates in the VHF band (108.0-117.95
MHz); 59 available frequency selections
4.
Limitations
a.
Line of sight
b.
Standard Service Volume (SSV)
(1) A VOR service volume limitation is
the reason federal airways top out
at a maximum altitude of FL450.
The maximum VOR service
volume is limited to 59 frequencies
Page 7-6
(4-01) Original
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