Propeller Guard Information Center

Archive for propeller

Michael Hinton was trying to retrieve his son’s hat which had blown into the water on September 10, 2000. He was on the swim deck, crouched, hanging onto the swim ladder and getting ready to reach for the hat. The swim ladder was anchored to the transom by a nylon strap through a grommet. The grommet broke and Hinton fell in, went under a few seconds, then surfaced several yards away.

The boat operator backed up to retrieve Mr. Hinton, he swam toward the stern, as Mr. Hinton looked up he saw the boat rapidly approaching, hit his chin on the swim platform, one of his legs was pulled into the propeller and severely injured, and later amputated.

Michael Hinton claims the boat had a defective swim ladder.

As noted above, the trial focused on the ladder, but they would not have had a trial is he had not been injured by the propeller.

The Jury decided in favor of OMC on February 2, 2012. Read More→

0 Categories : Legal Shorts

John McGarrigle and Barbara McGarrigle v. Mercury Marine. Civil Action No. 09-4625. United States District Court, D. New Jersey.


The Propeller Accident

Saturday, July 21, 2007, 37 year old John McGarrigle, of Pennsylvania, was operating a 12 foot aluminum fishing boat on Delaware Bay near Seabreeze, New Jersey about 5:20pm by himself. The small tiller steered boat, belonging to his father, was powered by a 2001 15 horsepower Mercury Marine outboard motor. The water was choppy, John was not wearing a lanyard kill switch. He was pitched overboard, the boat went into the “Circle of Death”, he tried to grab and re-board the spinning boat, and was struck by the propeller. John received severe injuries to his head and neck. A bystander on shore, swam out 100 to 150 feet and kept him afloat till more help could arrive. The prop strike victim was brought to shore in another boat and life flighted to an area hospital. The Coast Guard was able to stop the still circling boat by using a rope to foul its propeller. (Accident description was assembled from court records and several newspaper accounts.)

A New Jersey Patrol Officer interviewed the victim about a month later. The victim reported he had been going about 15 miles per hour, hit a wave, and was ejected. The same officer had responded to the accident. The patrol officer logged the accident as being caused by “excessive speed”, but testified he had no actual knowledge of the victim’s speed. Read More→

0 Categories : Legal Shorts

Follow Us On TwitterThis post is part of our coverage of the Listman v. OMC propeller injury trial

Robin Listman vs. Outboard Marine Corporation
Second Judicial District Court of the State of Nevada, County of Washoe

1 November 2011 Session One – pm (Note there was no morning session, this was an afternoon session per CVN) Read More→

0 Categories : Listman vs. OMC Trial

The boating industry has long objected to propeller guards. One of their frequent objections is the possibility that someone might become entrapped in the propeller guard (physically caught on the prop guard). We find their objection interesting considering we frequently encounter reports of boat propeller accidents in which people were entrapped in open propellers.

Swimmers and those who fall overboard can have their clothing or life jackets caught in the propeller. Others have their bodies impaled by the propeller and remain caught on the propeller somewhat like a fishing hook with the propeller embedded in their leg or trunk. Still others have been trapped between twin propellers.

These accidents are sometimes referred to as propeller entangled, propeller entanglement, propeller entrapment, entrapped by a boat propeller, and a host of other phrases.

A list of some of the occurrences of boat propeller victims being caught on propellers, entrapped by propellers, impaled on propellers, or having their leg embedded by a propeller follows: Read More→

Our Shock Mounted, Forward Facing, Catchers Mask Propeller Guard invention disclosure below was posted on 15 August 2011. We will make no changes to the text below line following this paragraph except to correct misspellings, punctuation, and to update html/computer codes and links. Any updates to the invention will be posted below the invention disclosure.


Shock Mounted, Forward Facing, Catchers Mask Propeller Guard Invention

Cowcatcher

Cowcatcher on Locomotive

Many cage type boat propeller guards focus on preventing people from contacting the propeller, not on moving people out of harm’s way. They form a nice physical barrier around the propeller with little regard for the damage that the barrier itself may cause to those struck while moving forward. Read More→

Earlier we pointed out the fallacies of CED’s propeller guard testing at SUNY’s circular tank not using a boat AND using chimes to represent people in The Emperor Has No Boat.

We came across an interesting article this weekend describing a joint Georgia Tech / Georgia Department of Natural Resouces (DNR) project using a boat to run over engineered models of turtles. Their earlier work was recently published in the September 2010 issue of the Journal of Experimental Marine Biology: Read More→

We created this Propeller Safety Inventions category in August 2011. I am listing some of our earlier inventions and linking to them here. We will be posting our future inventions in this category.

If PGT<2011 is beside the invention, more can be read about it on our Pre 2011 Propeller Guard Technologies page at the date provided. Some are thoroughly described, others are just briefly mentioned. Read More→

Kill Switch Lanyard

Lanyard photo courtesy of The U.S. Coast Guard

The United States Coast Guard (USCG) published an Advanced Notice of Proposed Rulemaking (Regulations) in the Federal Register on June 8, 2011. The proposal is titled, Installation and Use of Engine Cut-Off Switches on Recreational Vessels.

As part of the proposal, the Coast Guard also published a Preventable Fatalities and Injuries Report listing boating accidents from 2002 through 2006 in which the use of an Engine Cut-Off Switch / Kill Switch would have likely prevented the fatalities or injuries resulting from an operator falling overboard or otherwise being ejected.

The USCG proposal includes a Background Section with a history of the Coast Guard’s efforts to reduce vessel and propeller strikes since about 1990.

While the Coast Guard engine cut-off proposal seeks input on almost countless points, the two primary kill-switch issues being debated are: Read More→

0 Categories : Regulations

Following up on Hydrodynamics of Propeller Accidents Part 1, we now share some research work that looks very applicable to future hydrodynamic studies of human body / swimmer / man overboard interactions with boats, drives, propellers, and propeller guards.

Whale Model

Whale Model

We recently came across some hydrodynamic studies of whale interactions with ships, ship hulls, and ship propellers. One study was done at Carderock (the U.S. Navy lab facility we earlier suggested as a possible location to do full scale interaction studies with small boats). In the whale ship interaction study, they used a scale model of a huge containership with an elliptical bow bulb along with an instrumented model of a right whale.

The study is cited below.

Hydrodynamics of a Ship/Whale Collision.
Gregory K. Silber, Jonathan Slutsky, and Shannon Bettridge.
Journal of Experimental Marine Biology and Ecology.
Vol.391 (2010) Pages 10-19.
an Elsevier Journal.

Several quotes in the journal are strikingly similar to the needs of propeller guard hydrodynamic studies. The abstract contained the quote below:

“Factors influencing the incidence and severity of ship strikes are not well understood, although vessel speed appears to be a strong contributor. The purpose of this study was to characterize the hydrodynamic effects near a moving hull that may cause a whale to be drawn in or repelled from the hull, and to assess the acceleration exerted on a whale at the time of impact.”

Read More→

Little research has been done surrounding the hydromechanics of people / swimmers/ man overboard encounters with propellers or propeller guards. We will now explore this field, some of the opportunities it presents, and some recent research that looks very applicable to studying the hydrodynamics of human / boat / propeller / propeller guard interactions. We will begin by exploring the history of what has been done to date. Read More→