Richard (Dick) Snyder deposition in Ard v. Brunswick boat propeller injury case. Portions relating to how much money Brunswick / Mercury Marine spent on testing / developing boat propeller guards.
Houseboat Propeller Regulation Proposed and Withdrawn by USCG: Analysis by PGIC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