Outboard Marine Corporation (OMC) and Mercury Marine testing of propeller guards at State University of New York (SUNY) at Buffalo in 1990 in their circular water tank facility now called CRESE.
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Houseboat Propeller Regulation Proposed and Withdrawn by USCG: Analysis by PGIC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