The TD correlates tracks using BRASH data. Which five data items are included in BRASH?

• A. Bearing, Range, Altitude, Speed, Heading
• B. Bearing, Range, Altitude, Velocity, Heading
• C. Bearing, Range, Latitude, Speed, Heading
• D. Bearing, Radius, Altitude, Speed, Heading

Answer: (A)

BRASH data describe a target’s instantaneous state in five measurements that let a tracker match the same target across scans. Bearing and range pin down where the target is relative to the sensor. Altitude adds the vertical dimension, turning position into a true 3D location. Speed indicates how fast the target is moving, while heading shows the direction of travel on the horizontal plane. Together, these five values provide enough information to predict future position and maintain reliable track correlation over time. Alternatives replace elements with geographic coordinates or different motion descriptors that don’t align with how BRASH encodes a target’s state, so they wouldn’t support the same consistent matching.