So the height I think refers to them stepping up the latter so to speak. The pumping can allow them to briefly pinch to gain that extra height.To clarify, if you need to close the gap of your leyline to the mark, pumping could help you do so.

i agree. it looks ugly

Get a Life. Don't knock it, just because you can't do it yourself..... It separates the skillful from the not.

I have been racing performance dinghies for almost forty years and can assure you that if I wanted to I could. It is forbidden in the vast majority of classes as illegal propulsion for good reason: it isn't sailing. @@Si-jk4iy

Follow the rules. Complaining about the rules will get you no where.

@@danknox9986 I follow the rules in a class where pumping is classed as illegal propulsion which can be penalised by disqualification. Rightly so. Pumping is not sailing.

It is Athletic, Skilful & Mighty difficult to perfect, and moreover, here to stay. Deal with it.