presser at 70 feet under water?

Answer 1

The question can't be answered because there was no specification as to what the question is asking about. But these are my answers:

If you are human, with the right Scuba gear and practices, you can dive to the most 1000 feet, other than that, you'll die.

If it's a submarine, the deepest is at 3000 feet, other than that, the submarine will start to get crushed.

I hope this answers your question.

Answer 2

you will die

Answer 3

You won't suvive