(i) Butterfly Stroke : The arms are at shoulders width apart and pulled back together under the body elbow slightly bent in almost a double free style arm action. The arms leave the water at hip level and are thrown side ways forward through the air in a flying action to the entry position. The first is like the ordinary breast stroke leg kick but is not so wide after the hands entered the water. The head can be either forward or turned side ways to breathe.
(ii) Temperature of pool during competition min. 24°C max. 26°C.
(iii) FINA : Federation International de Nation Amateur.
