How to swim in moving water when rafting?

There are two types of swimming on the river, one is defensive swimming and one is aggressive swimming. With defensive swimming what you’re really doing is laying on your back, feet downstream and looking for help, sort of getting yourself oriented to the river, trying to figure out where you are and then getting yourself comfortably there. Defensive swimming tends to be for novice and guests that are real, or not real familiar with white water. A person swimming defensively is looking to be rescued by somebody else rather than really taking the initiative and rescuing themselves. The aggressive swimming, aggressive white water swimming is where the guide, or an experienced,white water person is taking control of their situation and swimming aggressively,from one side of the river to the other, either to the quickest point on shore or to avoid,a certain obstacle while you’re out there. If we do not know how to swim on river and it is very difficult to save the life and we con not rescue for other. It is necessary for the rafting guider.