RedactedNarrative: Two personal watercraft were operating in the same vicinity. PWC #1 had three people on board and was pulling a tube with two people on it. PWC #2 was being operated by Operator #1's son with one passenger on board. PWC #2 was traveling in short distances. Operator #1 assumed PWC#2 would keep going in the direction he was going, but PWC #2 stopped. As PWC #1 went past, the tube it was pulling crashed into the side of PWC #2. Both tubers were injured, one had a non-life threatening back injury and the other had an abrasion on his arm. The two victims were transported to the hospital. All parties involved were wearing life jackets. There was no damage to the personal watercraft. Operator #1 was cited for allowing his 16 year old son (Operator #2) to operate a personal watercraft without a boater's permit.