Figure 29

INSTRUMENT NAVIGATION

Figure 29

In the figure above (Figure 29), the aircraft is on the 015 radial heading 180. To intercept

the 360 radial and maintain an inbound course of 180, you need to determine the proper

direction and amount of turn in order to comply.

Working with the top half of the RMI only, we note that the head of the #2 needle must move

15 to the left from 195 to 180. Therefore, all we have to do is turn 15 to the right of the

present position of the needle to 210. Shortly, we will note that the head of the needle will start

moving toward 180.

As the head of the #2 needle approaches the desired course, turn the aircraft back to a heading to

maintain that course.

In the previous example, we found it necessary to convert radials to inbound courses. If you are

flying from CEW to MGM, 43 nm out of CEW you must switch your TACAN ahead to MGM.

Your RMI should resemble Figure 30.

3-20 RADIAL TRACKING AND COURSE CONTROL