On Mar 4, 6:37*am, HK wrote:
Vic Smith wrote:
On Tue, 03 Mar 2009 23:46:42 -0500, Wayne.B
wrote:

On Tue, 3 Mar 2009 20:18:50 -0800 (PST), Frogwatch
wrote:

Any reasonable thoughts on strategies for such conditions to avoid
turning over? *Any thoughts on design of a boat to minimize such?
Naval architects have theorized, confirmed by testing, that *any* boat
can be capsized by a wave of the right size and shape. * There are
screening formulas that you can search for, but as an approximation, a
steep breaking wave with a height of slightly more than half a boat's
maximum width (beam), can cause a capsize. * Large Bertram
sportfishing boats have been capsized, 120 ft Alaskan fishing boats
have been capsized, heavily ballasted keel boats have been capsized,
and many, many others. * In other words no boat can be considered
totally safe in extreme conditions, and small boats become unsafe very
quickly. * The coast guard has rescue boats that are designed to
survive capsize by virtue of rugged water tight design, heavy
ballasting, and carefully designed mechanical systems. *They can
survive capsize but can not totally prevent it.

There was actually the possibility of righting that Everglades if they
had been prepared for that. *No reason they should be, but with 4
strong heavy guys and the right technique and gear it was a
possibility.
Then they'd face the issue of bailing without rolling it again in
heavy seas.
I read once of a guy who got pretty good at righting his bigger racing
multi-hull with a little powerboat assistance. *
All Monday morning quarterbacking now. *What a shame they couldn't
all stay with that boat.

--Vic

I don't see how it would be possible. A 21' boat like that upside weighs
more than the strength of four guys NOT standing on solid ground to turn
it over. How could you get leverage?- Hide quoted text -

- Show quoted text -

Wow, for someone who claimed to have a degree in Mechanical
Engineering, you sure don't understand vector mechanics very well.