RedactedNarrative: Watercraft #1 was trolling northbound on the eastern shoreline of the lake. While traveling 2-4 mph with a trolling motor, Watercraft #2 was on plane coming from the rear. 
  
  As WC #2 approached, Operator #2 did not see WC #1. As a result, the bow of WC #2 struck the transom area of WC #1. Operator #2 thought he was going approximately 20-plus mph. He also stated that he had a tiller motor and was not able to clearly see ahead. There was some damage to both watercraft. Life jackets were being worn in WC #2 but not in WC #1. There were no injuries. Alcohol was not a factor.