RedactedNarrative: Watercraft #1 was cruising about 15 MPH and slowing to approach their dock. Watercraft #2 was anchored in the same area. Operator #1 did not see WC #2's anchor light and collided into the outboard engine of Watercraft #2 causing damage to the motor and also the hull of Watercraft #1. Life jackets were worn by all and there were no injuries.