Figure 5-4 Affect of Turn

CHAPTER FIVE

T-6A NAVIGATION

The next four steps (Turnpoint, Time, Update and Wind) provide us a position analysis process

that analyzes where the aircraft is now, after the geometry effects of the turn. These four steps

will get the aircraft back on mission course and timing.

Turnpoint Analysis

This is the first step of four which will get the aircraft back on the mission course/time. We must

understand how a turn affects our course. During turnpoint analysis, you determine the plane's

actual position in relation to the black line and tick marks on your chart, then you attempt to

correct the aircraft back onto course.

Turnpoint Geometry. If you are not directly over the top of a turnpoint, you will actually

increase/decrease the distance the aircraft has to fly to stay on mission profile. After a turn, you

must analyze the consequences of the turn geometry as it relates to course centerline.

Determining how far off course you are can be done by means of the relationships shown in

Figure 5-4. If you were off course by a known amount going into a turnpoint, afterwards that

distance will change depending on the amount of the turn. Knowing these relationships will help

determine distance off course and help establish time corrections.

Figure 5-4 Affect of Turn

5-12

FLIGHT PROCEDURES