TACAN and VOR Procedures
T-45C TS, ADV, & IUT RIFP-02
C.
Determine distance flown (every 1/10 nm equals 6 kt)
and multiply distance by a number that corresponds to
the amount of time traveled to get ground speed
EXAMPLE: Your distance flown is 6 on the DME
indicator. Elapsed time is 1 minute, so 6 times 60 equals
360. Ground speed is 360 kts (6 nm/min times 60 min/hr
equals 360 nm/hr).
NOTE: The ground speed check requires tracking
directly to or from the station. Refer to the ground track
marker.
NOTE: To increase accuracy, check ground speed for
more than 1 minute; preferably, 3 minutes.
VI. Correcting for wind drift using TACAN/VOR/VOR DME
2.7.5.1.8.1
NOTE: To compensate for wind, use a wind-corrected
heading (WCH) that stops drift from your course. The
difference between WCH and desired course is called "crab
angle."
NOTE: The T-45C displays aircraft drift via the ground track
marker on the HSI. Nonetheless, you should be able to
correctly derive drift angles using the following basic method.
A.
Determining WCH and crab angle
1.
Establish radial track determining WCH and crab
angle on course (CDI centered)
2.
Check for indication of drift on using the CDI
3.
Turn the aircraft sufficiently back into the wind to
reintercept the course (CDI centered)
4.
Reduce intercept heading to maintain track on
course with enough crab angle to keep CDI
centered. Readjust until the drift is "killed"
(5-99) Original
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