Hello Folks. Firstly thanks for all your answers, i find them very interesting and informative. Parabolic! Please tell me in simple words what it means. Thanks very much. Richard.
In simple terms, it is the shape of the seating looked at from the side to make sure everyone can see the near touchline. This means that the seating goes up in a curved shape. We'll try to get some pictures and an explanation onto Seagull's World in the next week.