Figure 2 - P-8250100

INTERCEPT PROCEDURES TEXTBOOK

Figure 2

GCI Counterturn

Without normal counterturn cues of ROC and intercept drift, the fighter has to correlate

bogey bearing position on the BDHI to ensure proper drift control. Drift should match the

appropriate ideal drift curve for the target aspect.

As soon as GCI gives a bearing call that indicates outward drift, or no later than 1-2 seconds

after steady up, the fighter should start the CT. Turn rate is the same as if a contact was on the

scope, and the fighter should vary it as necessary to control drift with respect to the ideal curve.

As noted before, the delay in updating the GCI scope requires some interpolation by the fighter.

A hot or cold situation will not be readily apparent.

The CDI bar on the BDHI is a good tool for the fighter to anticipate important positions of

the CT, such as through the 180 DTG and at the 90 DTG positions. However, the CDI bar

should never be used as a replacement for good intercept situational awareness. It is highly

discouraged for use during the intercept, as it slows down the RIO/WSO and takes time

away from the primary duty of controlling the intercept.

Patience and an internal sense of timing will assist the

fighter in controlling drift throughout the CT.

GCI Rear Quarter Drift Control

Once past the 45 DTG position, with the bogey bearing within 20 of the nose, drift rates will

decrease rapidly. To prevent fighter weave, the fighter should use no more than a standard rate

turn. The rear quarter drift control procedures of splitting the difference apply.

In the rear quarter, the weapons officer should concentrate less on the BDHI and more on

proper search increments to acquire the bogey. A good rule of thumb is to never move the

thumbwheel while scanning the BDHI to avoid missing a contact. Discipline and patience are

critical.