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.
Those who have experienced a heart attack (myocardial infarction) can fly after two weeks. Those who have had heart valve repair or replacement surgery or coronary artery bypass grafts (open heart surgery) can usually fly after 4-6 weeks (longer if they have had pulmonary complications).