T-45C TS INav-05
TACAN/VOR Navigation and Holding Procedures
c. When lead point is reached, turn to intercept
NOTE: The CDI may not have started to move at
lead point because it is not active until you are
within 10 degrees of the course.
d. Track inbound on radial
4. Performing a ground speed check
NOTE: For a reliable ground speed check, the DME
from the station should be greater than aircraft altitude
in thousands of feet.
EXAMPLE: Altitude is 30,000 ft (FL 300), so DME
should be 30 nm or greater.
a. Start timing when DME indicator displays a whole
b. After predetermined time (in minutes), check and
c. Determine distance flown and multiply that number
by multiplier corresponding to time flown
EXAMPLE: Your distance flown is 6 on the DME
indicator. The 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: Track either inbound or outbound on a given
radial when making a ground speed check.
NOTE: Every 1/10 nm equals 6 kts.
NOTE: Checking ground speed for more than 1
minute increases the accuracy of this method.
5. Proceeding direct between TACAN fixes (point-to-point)
a. Tune and identify station if not already done