I am trying to use every class and methods in Icommand. I have to use NXT with my students. About the object ServoNavigator: I don't understand the meaning of the parameter "ratio": the ratio of sensor rotations to wheel rotation. Is it a constant? What changes in the NXT behaviour, if I change this value?

About the method gotoPoint (double x, double y): how can I think the coordinate? do they have a measure?

Thanks a lot for an explanation, sorry for my very poor english.

                   Maria Luigia Nitti