The Iranian threat, of course, is real, but its immediacy gets turned on and off by the Prime Minister like a faucet. In this tube the coals were placed, and when the water in the urn was hot, it could be drawn off by means of a faucet at the side. The drip-drip of water from the faucet sounded loud in the quiet.
After multiple dives per day or multiple days of diving, a minimum surface interval of 18 hours is recommended. If you had to do a decompression stop during a dive, the recommended time to wait before flying is a bit more of a gray area.
Imagine taking a deep breath and diving as far as you could into the ocean. Without experience and a free diverâs knowledge, your natural buoyancy would probably keep you from getting very far. But then again, so would your need for oxygen. Now, imagine staying under water for more than four minutes.