When I was attached to the Navy at Mare Is. we learned different techniques to survive in the water. I thinking he just relaxed, arched his back and controlled his breathing. Of course you need calm water to do that otherwise you’re using vital energy treading water.
This war is all about bottling Russia up denying her the warm waiter ports that she depends on.
That is a vital national interest.
This is the punishment the Globalists have inflicted on Russia for denying their designs for a one world government and becoming a de facto Christian nation.