Figure 2 - P-8250025

INTERCEPT PROCEDURES TEXTBOOK

Figure 2

To utilize these two displays effectively, aircrew should envision the fighter's projected flight

path as extending through the center of the BDHI and the scope.

The BDHI and AI Scope

The fighter's flight path runs vertically through the center of the BDHI. The BDHI has left

and right-hand fiducials, located 45 left and right of the center. There are also fiducial markers

at 90and 135 left and right of the dead ahead position. The AI scope is a B-scope used to

display azimuth and range of airborne targets.

Think of the AI scope as a big window centered on the longitudinal axis of the fighter, with

the window edges extending out 60 left and right. The angle off (AO) is the angle from the

fighter's flight path (fighter's nose) to the bogey. AO is always stated in degrees right or left.

With the 20 mile range scale selected, the range on the scope is measured from 0 miles at the

base of the scope to 20 miles at the top of the scope, with horizontal lines dividing the scope into

5 increments (in this case, 4 miles each).