On Fri, 16 Oct 2009 11:49:26 -0500, Vic Smith
wrote:

I suspect most holings in glass are jagged and take odd shapes.
And there's probably no time to whittle.

That's all true but the vast majority of boat sinkings, large and
small, are caused by other things.

http://www.boattest.com/Resources/vi...spx?NewsID=609

On larger boats raw water hoses and hose clamps are a common problem.
Other than good preventive maintenance, the best defenses are high
water alarms and large bilge pumps.