Cylinders model an adult human to determine risk of being swept away in a tsunami. From An Approach to Design Evacuation Route Through Developing Tsunami Casualty Model. Muhari, Koshimura, and Imamura.
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Houseboat Propeller Regulation Proposed and Withdrawn by USCG: Analysis by PGIC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