IP-6: Fundamentals of Intercept Geometry II

INTERCEPT PROCEDURES TEXTBOOK

IP-6: FUNDAMENTALS OF INTERCEPT GEOMETRY II

Collision Bearing

Collision bearing (CB) is defined as an angle equal to one-half the cut angle and in the same

direction as the cut (assuming a co-speed intercept). Collision bearing is also referred to as

Collision Antenna Train Angle (CATA).

40 Left cut

Example:

40L cut = 20 Left CB

When a co-speed collision intercept is established, the angle off is equal to the collision

bearing. For example, 150 DTG, 30R cut, AO 15R. (1/2 of 30R = 15R)

On the B-scope presentation shown below, note that the bogey starts off of collision bearing.

Secondly, notice that once a contact is off of collision bearing, its drift will always be away from

collision bearing.

Figure 1

A bogey off collision bearing will always drift, and the drift will

always be away from collision bearing