SBA Houseboat Propeller Accident Chart from their public submission to the U.S. Coast Guard proposed regulation USCG-2001-10163 dated March 11, 2002.
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Houseboat Propeller Regulation Proposed and Withdrawn by USCG: Analysis by PGIC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