Propeller Danger Decal seen on a Brunswick Bayliner boat at the 2012 Tulsa Boat Show. One of few instances of a Danger decal with a propeller v. a Warning decal.
Houseboat Propeller Regulation Proposed and Withdrawn by USCG: Analysis by PGIC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