– How can Navy submarines communicate / navigate but the missing titanic submersible can’t do either.

Question

Context: https://www.bbc.com/news/world-us-canada-65953872

The above titanic submersible that went missing can only send short text messages from the ship to the submersible. From my understanding there is no GPS underwater and radio communication is impossible. How can Navy submarines communicate and navigate while submerged in the ocean but the missing submersible can’t?

In: 121

Answer 1

What scenarios could be possible under the “catastrophic hull breach” theory? Are we talking another unknown vessel or missile type of device? Or are we talking some large animal like a shark or whale? Or simply the design was flawed and broke on its own? Or someone inside did something to cause the breach?

I am very unfamiliar with submarines in general as well.