U.S. Coast Guard (USCG( Recreational Boating Statistics 2012. A summary of their Boating Accident Report Database (BARD) data.
Houseboat Propeller Regulation Proposed and Withdrawn by USCG: Analysis by PGIC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