Which factor can cause radar to record speed inaccurately?

• A. Correct use of the device
• B. Laser alignment
• C. Panning
• D. Static positioning

Answer: (C)

The option referring to panning is associated with a situation where the radar device is moved side to side while attempting to measure speed. This movement can disrupt the radar's ability to correctly track the target vehicle, leading to inaccurate speed readings. When a device is panned, it may cause erroneous measurements due to the Doppler effect, which relies on consistent alignment between the radar and the moving object. Proper use of radar equipment, including avoiding panning, is essential for ensuring accurate readings.

In contrast, correct use of the device represents proper operation, which would not contribute to inaccuracies. Laser alignment refers to ensuring that the aiming of the laser or radar is on target, which is also vital for accuracy. Static positioning indicates that the device is held still and aimed directly at a moving object, which would support accurate readings. Therefore, panning is the only factor listed that can deliberately lead to miscalculated speed results.