National Marine Manufacturers Association (NMMA) public comments on USCG-2011-0497 proposed propeller strike and carbon monoxide rule as a wordle. Middle sized image.
Aspects of the Propeller Safety Debate chart
Houseboat Propeller Regulation Proposed and Withdrawn by USCG: Analysis by PGIC
History of Boat Propeller Safety
Mitigating Boat Propeller Injuries & Fatalities Chart