Figure 4B

INSTRUMENT NAVIGATION

There are not exact formulae to apply for the effects of wind and determining a lead point.

Just be aware of how wind will affect your aircraft movement when turning on an arc and decide

which method will be your course of action.

When entering an arc from a radial while tracking inbound the same general rules apply (Figures

4A, 4B, 4C).

Figure 4A

Figure 4B

Figure3 4C

ARC INTERCEPTIONS

In the cases pictured above, we entered an arc from a radial. When a radial crosses an arc, a

90 angle is formed. Therefore, the heading on which you choose to enter an arc should differ

90 from the heading you maintained on the radial (Figure 5),

Figure 5

4-4 TACAN ARCING