The system lacked effectiveness on cloudy nights, the range of the  radar [] was too short and it could not Identify friend or foe, which led occasionally to attacks on friendly night fighters; some night fighter crews disliked ground control for the loss of flexibility.
The radar system's effectiveness diminished under cloudy conditions, with a limited range that made it difficult to identify friends or foes. This resulted in occasional friendly fire incidents, and some night fighter crews found ground control frustrating because of the reduced flexibility it provided.