there is another side to the debate , it does tend to rely on the radar operator knowing how to use the radar , last year i came pretty close to being hit by a bulk carrier in the middle of the channel because i hadnt tuned the radar in well enough the ship was not sounding his horn as he should but never the less if the radar had been tuned in better we may have had more warning to move, these days the electronics we use have so many features you need adegree to understand them