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.
Under the new rules, pilots could be landing commercial jets after 22 hours awake - including 11 hours flying, plus stand-by time and travel to the airport. Under the current UK rules, pilots work a maximum of three early starts in a row and a maximum of 95 hours in 14 days. EASA is proposing to change this to seven early starts in a row and a maximum of 110 hours in 14 days.