Heddon Johnson kill cord petition on Change.org. The photo is of his son, Tristan Douglas-Johnson killed by a boat propeller in a kill cord preventable accident at a boat show in 2000.
Houseboat Propeller Regulation Proposed and Withdrawn by USCG: Analysis by PGIC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