INTERCEPT PROCEDURES TEXTBOOK
Note that in the previous examples fighter heading was adjusted to establish an angle off that
is equal to but opposite in direction to the target aspect. When the fighter heading coincides with
the collision course for a given TA, the collision bearing (remember, CB = 1/2 cut) coincides
with the bogey bearing. The bogey is now said to be "on collision bearing." When TA equals
AO in amount but opposite in direction, an isosceles triangle is set up. If a co-speed situation is
assumed, then aircrew should receive constant bogey bearing, decreasing range calls from GCI.
With a contact on the scope, the bogey will track straight down the scope at a constant azimuth
(i.e. the bogey will not drift).
Illustration of Collision Course Computation
Example: AO = 5°L, Cut = 30°R, BH = 290°, FH = 080°
(1) Compute cut, DTG, DOP
(2) Visualize these on the fighter scope as above
(3) Cut to AO = TA = 35°L
(4) Continue to the left of the 5°L AO another 35 degrees to determine CC at 40°L
(5) Since collision course is 40 left, command "Left hard 40, steady 040."