Figure 17 - P-8250087

INTERCEPT PROCEDURES TEXTBOOK

Figure 17

Rear Quarter Drift Control Without Radar Contact

If during the counterturn, the bogey is allowed to drift excessively and go off the scope, or

the fighter loses radar contact for whatever reason, the fighter should:

(1)

Continue turning with increasing turn rates as necessary and attempt to run the proper

drift curve via the RMI until approximately 45 DTG

(2)

Call "Lost contact" to GCI (immediately after losing contact - simultaneously with step

one)

(3)

Listen for GCI's first call of bogey bearing

(4)

Steady up on a heading half way between bogey bearing and bogey heading, once in

the rear quarter (45 DTG)

The rationale for the procedure is simple. The BB is a line from the fighter to the bogey.

The BB allows the aircrew to orient the fighter's position with relation to bogey flight path. The

same number of degrees that the FH is off of the BH is the same number of degrees the fighter is

off BFP.

Analyzing the possible options available, the aircrew can:

(1)

Turn to bogey bearing

(2)

Turn to bogey heading

(3)

Turn to a heading between BH and BB

Turning to bogey heading places the fighter on a parallel heading with the bogey. This

maneuver arrests drift but may not allow the fighter to arrive at the bogey's 6 o'clock. Turning

to bogey bearing will induce fighter weave. Option 3 is the best choice. This procedure is

commonly known as "splitting the difference".

Turning to a heading between BB and BH is lead pursuit,

which will cause range to decrease and control the drift

when in close.