Mercury Marine inflatable boat with a family onboard, and the father using the kill switch (emergency cut-off switch) on a 9.9 horsepower outboard motor.
Houseboat Propeller Regulation Proposed and Withdrawn by USCG: Analysis by PGIC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