Live Like Kali slogan / motto popularized by students after Kali Gorzell of Smithson Valley High School was struck and killed by a boat propeller on July 20, 2012 near Aransas Pass Texas. This design was inspired by some photos of her with horses.
Houseboat Propeller Regulation Proposed and Withdrawn by USCG: Analysis by PGIC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