Why can modern submarines dive much deeper than WW2 era U-boats? What technology made it possible?

in submarine •  3 years ago 

In this regard, there is no technological breakthrough; it all comes down to tactics and economics. Submarines were mass-produced in the hundreds during WWII, so they had to be inexpensive. Cheap meant fewer materials and a lower level of sophistication.
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Today's submarines are made in small batches, one at a time, and are far more expensive and larger than traditional subs, so they get everything.

The technology of the time was already capable of producing much deeper diving subs, albeit at a cost. Stronger pressure hull=more weight=more buoyancy tanks=more airpressure to blow it all

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