Willard Marine Press Release dated January 23, 2012. Awarded U.S. Navy contract for RIBs with special a propeller guard.
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Houseboat Propeller Regulation Proposed and Withdrawn by USCG: Analysis by PGIC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