Well, in our field, only 4 planes are allowed to be up at one time. I agree with Ken that if you lose control of you plane because you didnt, or lost sight of it, thats a horrible mistake, and i hope those instructors have enough common sense to pay for their mistake. ITs acutally really hard to lose sight of your plane while in the air. I never take my eyes of my plane, and i was really tempted at times. Once, during my training, after my solo, i was flying around and my instructor took up another kids trainer which was the same as mine, and i was abit nervous at that time, but nothing bad happened. TO sum it all up, i am very angry myself at how bad these instructors were. ITs a shame. I think this problem should be resolved as quickly as possible.