Deer Island 12 August 2012 satellite image appears to show the Bean 20 barge. Low resolution version. Courtesy of DigitialGlobe.
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Houseboat Propeller Regulation Proposed and Withdrawn by USCG: Analysis by PGIC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