T-45A UJPT & E2-C2 INav-05
TACAN/VOR Navigation Procedures, TACAN/VOR Holding
NOTE: Add lead when you're tracking to the
station; subtract lead when you're tracking from
the station.
(5) Adjust AOB to maintain proper distance by
keeping No. 2 bearing pointer on wingtip position
NOTE: You may combine the AOB and chord
methods to maintain the arc and aircraft control.
The two methods are normally distinguished
according to DME limits; however, outside of 12
DME the AOB required to maintain an arc will
probably be too small to hold accurately.
COMMON ERROR: Not monitoring DME and
rolling out at the wrong time and on the wrong
DME arc.
3. Intercepting a radial from an arc
a. Set desired course in course selection window
b. Determine lead point - divide DME of arc into 60 and
multiply the product by 1 percent of groundspeed.
60
60
15 = 4 radials;
------------- X 1% GS = LPC
250 x 1% = 2.5 groundspeed;
Arc DME
4 x 2.5 = 10 radial lead
c. When lead point is reached, turn to intercept
selected course
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
(6-99) Original
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