buoyancy

So the sub was built to spec, it's just the buoyancy calculations were wrong.

It's porous and non-rigid, and doesn't exclude air, so it's still got negative buoyancy in air.

The valve will tend to dump helium until the balloon reaches neutral buoyancy.

It simply drifts higher until it either reaches neutral buoyancy, or pops.

This rupturing causes an abrupt loss of buoyancy; a small number of fish float to the surface, but most sink to the sea floor.

After that, it will reach terminal velocity and fall down based purely on its buoyancy.

My fear there would just be they are similar in size and buoyancy to fish eggs and we might cause more harm than good trying to remove them.

You see back in the day you needed a ship with a lot of buoyancy to carry a lot of cargo, more cargo, more money.

There's no reason the buoyancy compensator couldn't be used to park the shipment until a ship headed the right direction passed over it.

That's true for buoyancy but vacuum definitely has a major advantage in area of flammability.

Now a wave comes, and briefly the force acting on the ship is "proportional" to the buoyancy volume, ie height of the wave and the area of water that the hull intersects.

Maybe you could replace some of the nitrogen with helium to achieve positive buoyancy without a temperature difference.

Despite having a supply of air, wetsuit, fins and buoyancy control device on, she got that drowning sensation when her respirator came out. Once she had someone to hold onto, sanity was restored but I totally got why drowning people are dangerous from then on.

Bonus points for ruggedised GPS+satphone so you can track it, and perhaps even instruct it to detach and inflate buoyancy compensator 10-20m underwater til you come collect.

I don't know but I keep getting a recurring imagery when thinking of these situations as of someone building a house on a raft, which immediately capsizes, but the buoyancy of the house causes the raft to lift out of the water.