Here's the rope

The air is...

It's impossible for the crew to escape with their own power

From the two's reckless action, it could easily be imagined that the conditions inside the ship had already fallen to a critical level

"If we die, please send our regards to our families in Sasebo," those two were attempting to contact the outside world to deliver this message

Perhaps those two had mistaken the direction of land as they made their escape

The effort and the time it took to escape to the sea's surface must have taxed their stamina to the limit

Tatsuta's crew confirmed that they saw the two, but also that they quickly sank and disappeared