RedactedNarrative: Vessel 1 was full of passengers and towing 2 on a tube. Operator of V1 put boat in gear and was plowing. Due to the high bow operator of V1 did not see V2 in front of them. Passenegrs (3) on V2 was yelling and trying to get attention of V1 which was approaching from their rear. V2 was in slow forward. They attempted to steer to the right, but V1 collided with far rear starboard corner of V2. V2 passengers were thrown to the port side from the collision, but remained int he boat. V1 traveled down the starboard side of V2 eventually coming to rest on front starboard bench seat. V1 eventually floated back into the lake. Severe damage to V2 (totaled). Operator of V2 sustained a neck sprain. operator of V1 cited.