[WildTurkey]

There's only one watertight bulkhead in the 688. Spilts the boat in half just in front of the reator. That's it. Either the front dies, the back dies, or they both die.

I think that if one floods the other will follow to the bottom!

[Robert A Cook PE]

Here, if the fwd MBT's couldn't hold air - if they'ed ben ripped on both sides, instead of just port, the boat would have "tipped down" and taken the pressure hull with it. Aft MBT's couldn't keep even the stern up, becasue their air would have got out the holes underneath.

They "might" have been able to stay submerged & travel using planes to keep trim with the MBT's flooded, but couldn't have surfaced and stay up!