Actually, guys, I am not convinced that a bit of floating foam will keep the boat above water anyway.
I'm considering removing it anyway based on the fact I will be taking this boat on lakes and not in the ocean anyway. As for air flotation, well, you're right there - it would be much better with several closed chambers in a boat that could not be filled if the boat got hulled.
From a PURELY PHYSICS point of view I can see that a boat with such chambers would float better than one with foam blocks.
Anyway, I promised pictures, I've got them to upload when I get a few minutes
Rick Donaldson, NØNJY
It's better to be hated for who you are, than to be loved for who you're not.
Let those winds of change blow over my head,
I'd rather die while I'm living than live while I'm dead - Jimmy Buffet