An accident involving jetskis on Lake Wakatipu has prompted Harbourmaster Marty Black to remind riders of the need to keep at least 50m away from other water users at all times.

A woman was taken by ambulance to Lakes District Hospital with a suspected leg injury this morning after two jetskis collided near the Frankton Marina.

Both the jetskis had been hired from a local firm and each was carrying two people when one reportedly ran over the top of the other, Mr Black said.

“From what I can tell, the contributing factors were speed and that the jetskis were too close together.”

People riding jetskis had to follow the same rules as other powered craft, which included a speed limit of 5 knots when 200m or less from the shore, and staying at least 50m away from swimmers and other craft.