RYA image of a boat kill cord. Image was cut from the new RYA kill cord posters released 10 May 2013 shortly after the Milligan accident.
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Houseboat Propeller Regulation Proposed and Withdrawn by USCG: Analysis by PGIC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