The guy above is correct, altitude has no effect on the BT transmission. You can assume they used the tech in a way it can't (or nearly can't) be used if you want, I guess. I'm not going to go and prove that they didn't because that was your assertion, not mine. The vessel had many successful dives before this happened, so logic would dictate that the wireless implementation was working.
Do you have evidence that this was the case, or are you moving the goal posts to the "no shit sherlock" zone for an easy win?
You kept insisting that I made an assertion when I didn't.
About my reputation, if this is a metric for you then maybe I should downvote you, right? I didn't downvoted you so far but maybe I should?
Let's try this!
HOOOOOO, look! you went from 2 to -4! It goes fast, right? Right? What a metric! You are a negative reputation now. And I only downvoted you in this thread! Now people will have a surprise when they look at your reputation.
I took the liberty of downvoting you more. You are now at -45. It's a good experiment on how flawed the reputation system works. Maybe you will, like me, refrain from smashing this downvote button and focus more on the content you write. You would see that you strawmen from the very beginning.
We know for a fact that wifi signal was not supposed to travel through the water, because the sub successfully reached Titanic several times before it was destroyed.
If someone had designed the sub in the bizarre way that you suggested, then it would never have completed a single mission.