North Carolina RADAR State Practice Exam

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Prepare for the North Carolina RADAR State Exam with essential insights and practice questions to boost your confidence. This comprehensive resource will guide you through the exam requirements, helping you maximize your chances of success.

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What is the formula used to calculate Target Speed when using a rear antenna while moving in the opposite direction?

TS = SS - CS
TS = CS - PS
TS = SS - PS
TS = PS + SS

The correct answer is: TS = SS - PS

The formula used to calculate Target Speed when using a rear antenna while moving in the opposite direction is TS = SS - PS. In this context, TS represents Target Speed, SS is the Speed of the Shoes (the speed of the patrol vehicle), and PS is the Speed of the Target (the speed of the vehicle being measured). When a vehicle is moving in the opposite direction, the relative speeds need to account for the fact that both vehicles are contributing to the closing speed. Since the patrol vehicle is moving towards the target in the opposite direction, you subtract the speed of the target from the speed of the patrol vehicle to get the correct Target Speed measurement. This formula ensures accurate tracking of the speed of the target relative to the patrol vehicle's own speed. Using this principle, officers can effectively gauge the speed of incoming or departing vehicles they are monitoring.