Bruce Williams saved his daughter, Emily, from the propeller of a circling inflatable boat in Massachusetts in August 2011. Image captured from a Patriot Ledger video.
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Houseboat Propeller Regulation Proposed and Withdrawn by USCG: Analysis by PGIC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