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this post was submitted on 18 Sep 2024
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Followed shortly by ‘oh shit’ and ‘we dropped two weights’ then ‘guys, it’s getting kind of wet in here…’
Just kidding, mostly.
Serious question: how does a submarine know how much it weighs?
Explosive decompression is almost instantaneous at that depth. They wouldn't have had a chance to even blink.
Implosive compression?
Wouldn't it have happened so fast that they never even registered the pain of being crushed? Like, the signal from the body never even reached the brain, it was so fast.
So fast they'd not even be able to register what was happening. Not a bad way to go.
Yeah, it was definitely intended as ~~humor~~ an attempt at levity.
Yeah, the ocean was decompressed by a tiny bit..
That's when your spaceship shreds apart.
https://m.youtube.com/watch?v=j8XgLX5FLdY
Doubly backwards
I assume that the submarine producer gives stats like empty weight from which the current weight can be calculated.
However, weight isn't the important thing in a sub. It's the weight to volume ratio, or buoyancy.
A sub sinks when buoyancy is negative and rises if the buoyancy is positive.
There are three common ways to achieve the changing buoyancy: the most simple one is a vessel with positive buoyancy adding droppable weights until the buoyancy is negative.
Other ways are a neutral buoyancy vessel that uses it's engine power to push itself up or down. Or a vessel that can change it's buoyancy by filling up tanks with water (to reduce buoyancy below neutral) and blow them out with air or other gases lighter than water (to raise buoyancy above neutral). A combination of several methods is also possible.