Is this a sea craft?

[KenB]

http://www.onthewater.com/boating/vi...an-60-seconds/

And should I be putting more expandable foam below decks on my boats?

Sure sank pretty fast.

[Solafide]

Yes.It looks like the one that went down off of Martha Vinyard last week.There is a post pertaining to it a page or two back on this forum.

[Bigshrimpin]

69 doesn't have the 2 giant foam filled stringers like the ones built after 1972. 69 has the 4 hollow stingers . . . doh.

[ScottM]

Sure is an SC and owned by "mitchman" on this site.

[KenB]

OK so I guess we gotta keep our eyes peeled and help him find a new one!

Very glad they safely made it in. Can't imagine the feeling of being miles offshore and seeing your boat go down.

[Bigshrimpin]

I have a 18 that is for sale, but something tells me he is gonna want a Boston Whaler, Scout, Henryo or some other unsinkable boat.

[KenB]

How much floatation do you have to add to get a sea craft to float? Figure 500 lbs for motor and steering, etc. The rest of a 20 is 1500 lbs?

So 2000 lbs of floatation. 60 lbs per cubic foot float... need 30 feet of floatation. The stringers are like 12' x 1' x 6" x 2 stringers = 25 cubic feet.
SO another 6 cubic feet is what, the space outboard of the stringers? The whaler nerds can go suck on that egg.

Foam numbers from here: http://www.shopmaninc.com/foam.html

ALso, does a floatation bracket and closed transom solve the problem? From the video it sounds like they were taking on water, gunned the engine, and the transom swamped as the water moved to the back of the boat.

[76Red18]

All boats can take on water, most will sink. Got to be able to pump the water out.