Air pockets, air bubbles, and water physics.

Bandersaur

So, we know leaking subs are a thing, but has any level of detail been planned for the bits that don't leak? Will I be able to take refuge in dynamic air pockets while I swim desperately for my scuba gear?

Then, once the hole is patched and my sub half full, will moving through and moving the sub itself cause the water to slosh around at all?