Figure 5 - P-8010104

INSTRUMENT NAVIGATION

Now, to determine the distance between the two points in the example, just count the number

of squares (including fractions) and multiply by 10 since each square is 10 NM in this case. See

Figure 5. The scale of NM per block may be increased as necessary. For example, for a distance

of 150 NM, each square may represent 20 NM. (Figure 5)

Figure 5

Pencil/Eyeball Method

Utilizing the same principles we learned on the CR-2, we can work point-to-point navigation

by the pencil/eyeball method. The big drawback to the CR-2 method is that it consumes too

much time. The pencil method, though not as accurate, is much quicker and shall be used on

your training flights here in VT-10.

In working this method, we equate the center of the RMI to the TACAN station. The

compass card then becomes the surrounding airspace. The tail of your #2 needle corresponds to

your radial, and your aircraft position will be somewhere along its length (between the center and

the end of the tail) (Figure 6)

5-6 TACAN POINT-TO-POINT