RedactedNarrative: Unit 2 was operating at less than no wake speed traveling east into the mouth of a large cove. Unit 1 was traveling north along the east shore line at a speed allowing the vessel to remain on plane. Unit 1 operator became distracted as he attempted to turn on his bilge pump and other switches. This inattention caused Unit 1 to strike the rear starboard side of Unit 2. Unit 1 traveled over the top of Unit 2 causing extensive damage to Unit 2. Unit 2 then sank a short time later.