T-45C TS, ADV, & IUT RIFP-02
TACAN and VOR Procedures
IV. Indications of TACAN/VOR/VOR DME station passage
2.7.5.1.7.1
A.
VOR: When the VOR breaks its "inbound" lock and
quickly relocks "outbound" as indicated by the VOR
bearing pointer and digital VOR bearing display
NOTE: The T-45C does not have a TO/FROM indicator.
B.
TACAN/VOR DME: Due to large size of the cone of
confusion associated with TACAN stations, time of
station passage is noted when minimum DME is
reached. Use same procedure for VOR/DME station
passage
NOTE: Limit your heading or corrections to within ten
degrees of inbound wind corrected heading when in
close to avoid overshooting.
V.
Computing ground speed using TACAN/VOR DME
2.7.5.1.5.1
NOTE: You can check ground speed while maintaining a
course to or from a TACAN/VORTAC station by ensuring that
the DME from station is greater than or equal to aircraft
altitude in thousands of feet.
DISTANCE (NM)
______________
X
60 = GROUND SPEED
TIME (MIN)
EXAMPLE: If the altitude is 30,000 ft (FL 300), DME should
be 30 nm or greater.
A.
Start timing with a whole number in DME indicator
B.
After predetermined time (in minutes), check and note
the exact DME
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