Lobster Boat Designs Breached Hull And Didn't Sink?

Breached hull and didn't sink? - lobster boat designs

So a few years, I have friends and boating (yes, it was stupid), but was a big rock and began to fast on the water. We have so quickly into the ocean as a candidate country as we had. The boat was 22 'Parker with a speedboat. When we 1 / 2 of the edge of the cavity was filled and began to run from the back of the boat. We ended up finding a lobster boat that we are able to link A. As he did not move the bridge and about 3-4, "flooded with water, but falling further. I wonder why, when I had heard that most ships are now Styrofoam or foam in the hull to avoid sinking completely, right? useful in this case would make it, just curious.

When we arrived at the port and took the boatWater, had a 3 "hole and a gap of about 15-20 cm long. I just get lucky and these things are designed so that it appears to fall when a catastrophic error?