Quantcast Intercepting a radial from an arc - P-12820149

 

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T-45C TS INav-05
TACAN/VOR Navigation and Holding Procedures
(2) Determine direction to turn
(3) Determine desired lead point
(4) Initiate 90-degree intercept when DME equals
radius of arc plus or minus desired lead
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 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 ground speed.
60
60
15 = 4 radials;
------------- X 1% GS = LPC
250 x 1% = 2.5 ground speed;
Arc DME
4 x 2.5 = 10 radial lead
Page 5-10
(2-02) Original


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