Midnight Express boat with quint Verado outboards involved in snorkeling propeller accident 17 October 2014 in Florida. Image clipped from South Florida 6 news video coverage.
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Houseboat Propeller Regulation Proposed and Withdrawn by USCG: Analysis by PGIC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