How should a ski boat operator approach a skier who has fallen?

Water skiing is fun and challenging activity that requires some special skills by the boat operator and the skier. 
After falling, the skier should hold a ski up out of the water while waiting to be retrieved, and if necessary waves his or her arms.
The boat  operator should approach the skier slowly to either return the tow line or pick up the skier and should always keep the skier in view and on the operator’s side of the boat.

Idon't know what ur asking