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.
Houseboat Propeller Regulation Proposed and Withdrawn by USCG: Analysis by PGIC
History of Boat Propeller Safety
Mitigating Boat Propeller Injuries & Fatalities Chart
Four Volume Review of the Boating Industry’s Boat Propeller Guard Product Liability Defense