T-45A UJPT & E2-C2 INav-03
Use and Operation of TACAN, VOR, VOR/DME
(1) T (Terminal): from 1,000 ft AGL up to and including
12,000 ft AGL at radial distances out to 25 nm (will not
appear on high altitude charts)
(2) L (Low): from 1,000 ft AGL up to and including 18,000 ft
AGL at radial distances out to 40 nm
(3) H (High)
(a) From 1,000 ft AGL up to and including 14,500 ft AGL
at radial distances out to 40 nm
(b) From 14,500 ft AGL up to and including 60,000 ft AGL
at radial distances out to 100 nm
(c) From 18,000 ft AGL up to and including 45,000 ft AGL
at radial distances out to 130 nm
NOTE: Standard Service Volume limitations do not
apply to published IFR routes or procedures, i.e., some
published routes may exceed these limitations, but
have been flight tested and can be used with
d. Erroneous TACAN indications
(1) 40-degree azimuth error lock-on may occur, caused by a
weak airborne receiver. Azimuth indications will be 40
degrees or some multiple of 40 degrees in error.
Rechanneling causes the aircraft receiver to attempt to
relock
(2) Adjacent channel interference occurs when an aircraft
receives signals from more than one ground station.
Normally, this occurs at high altitude when the ground
stations are too close together. DME, azimuth, or ID for
either ground station may be received. Location of ground
station, not equipment functioning, is the problem
(3) False or incorrect lock-on is an airborne equipment
malfunction caused by older crystal-controlled TACAN
equipment. The T-45A should not experience this problem
6. Identified by aural 3-letter Morse code repeating every 35 seconds
7. Neither transmits nor receives voice communications
(6-99) Original
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