Pictured below is Lieutenant, Christopher Frederick, M.D, who is currently training to become an Undersea Medical Officer for the United States Navy. Chris sent this picture and informed us that all of the Navy's aquatic training facilities have this sign prominently displayed and stated that they rigorously enforce this policy.
Thank you Chris for your service to our country and thank you to the
United States Navy for recognizing the potential hazards
associated with prolonged breath-holding.