自满的威胁
作为一名潜水员，经验越丰富，出问题的可能性就越小，对吧？没有错！西蒙·普里德莫尔说
向后滚入水中——在这个阶段，您需要确保您的设备一切正常。
来自生存 从观点来看，水肺潜水员必须了解并保持对自满所带来的危险的理解。
潜水事故的受害者可能是经验丰富的潜水员，也可能是新潜水员。无论您潜水了多少次，您都无法幸免。
事实上，你的经验越丰富，你面临的风险就越大。
以下案例展示了自满情绪如何在不知不觉中悄悄降临到您身上，直到有一天发生的一件事让您意识到您并不是您所认为的细心、尽责的潜水员 - 并且您认为的一些事情知道水肺潜水是完全错误的。
1）这不可能发生在我身上！
艾米是一位专业的潜水向导。事件发生时，她已经从事潜水工作 12 年，潜水次数超过 2500 次。
她在 节日, diving off the island of Halmahera in north-east Indonesia. It was the first dive of the day.
She slipped her gear on in the boat, did her usual checks and back-rolled into the water. She had a problem descending at first, so exhaled a little more fully than usual, ducked headfirst below the surface and kicked down.
艾米正在沙坡上进行淤泥潜水，她像往常一样集中精力寻找东西。
Fifteen minutes into the dive, at a depth of around 30m, her tank-valve started banging into her head. This was a bit annoying, so she took her gear off, adjusted her tank-strap and put her gear back on.
她再次出发，但很快就开始感到呼吸困难。 “该死的，”她想，“当一切都不顺利时，这将是一次令人恼火的潜水。”她尝试换成她 章鱼，但呼吸也很困难，所以她转回主要内容并继续前进。
Then she checked her pressure-gauge. She didn’t think that she had an air-supply problem – after all, she was still less than halfway through her dive. She was just making her usual routine occasional check.
指针指向零！
“嗯，我需要我的伙伴，”她想。幸运的是，他就在附近拍照，事实证明他是一位非常有能力的潜水伙伴。
他有足够的空气，护送她到地面，没有发生任何进一步的戏剧性事件。
发生了什么事情？
When Amy got back to the dive-centre, her first mission was to find out what had happened. Apparently, the staff on the boat had not changed her cylinder overnight and she had gone into the water just with the 80bar or so remaining from her last dive of the previous day.
尽管潜水中心犯了一个错误，艾米承认她耗尽空气的责任完全由她一人承担。
她说，在这件事发生之前，如果你问她是否经常在下水前检查空气，然后在潜水时经常检查空气，她会斩钉截铁地说：“绝对是；” 100%，每次潜水！”
嗯，显然不是！她得出的结论是，可能是因为她的空气消耗量总是比她一起潜水的任何人都要好，多年来，她在不知不觉中已经失去了检查的习惯。
In addition to failing to check her gauge, she had completely missed a number of warning signs that, given her experience, she should have picked up.
The reason why she had difficulty in making her initial descent, and why her tank-valve started banging against the back of her head, was that the air in her tank was low and therefore the tank was more buoyant than usual.
Finally, she started to have difficulty breathing because the air-pressure in the tank had dropped to a level below that required to enable the 调节器 才能在深度正常工作。
后来回顾这一集，她想知道为什么尽管有这些警告信号，她却没有早点意识到自己可能已经处于危险的空气不足状态。
她只能认为这是深度麻醉减慢了她的思维过程的结合，正如前面提到的，她的潜意识（和错误的）自信，以她所有的经验，她永远不会遇到空气供应问题。
2) 快用完了！
Ben is a master 讲师 and was diving in South Komodo, Indonesia, when he had an unusual experience.
当天第一次潜水十分钟后，在大约 18m 的深度，他同时感觉到并听到了巨大的爆炸声，压力波从上方袭击了他。
His first thought was that he had been fish-bombed. After all, he was in remote south-east Asia and it had happened to him before.
It was only when the thunderous noise did not stop that it occurred to him that this could not be a bomb. He concluded (correctly this time) that a catastrophic air-supply failure had just taken place somewhere right behind his head
The next few thoughts, actions and decisions came quickly, one after the other. He looked at his pressure-gauge, which was already down to 100bar and falling fast.
他实际上可以看到针在移动。他还能呼吸，但这种情况不会持续太久。
本的第一个想法是把他的BC脱下来，带到前面，这样他就可以查明到底发生了什么，看看他是否可以自己处理，但他担心他没有足够的时间。
那时他意识到他需要一些帮助。队伍中的其他潜水员距离不远，当他游向他们时，身后有一股泡沫喷泉，其中一名潜水员正确地猜出了问题所在，并部署了她 调节器 并与他一起上升到地面。
发生了什么事情？
When Ben got back on board the boat he found that the O-ring in the valve face of his cylinder had split.
它可能已经显示出损坏的迹象有一段时间了，让一点高压空气轻轻地从它旁边冒出来，但他甚至没有注意到。他想，即使他看到了，他也可能不会认为这值得担心。
然而，当它失败后，却引起了他的全部注意。
在潜水前，他曾多次看到损坏的 O 形圈在水面上受到撞击，但从未在水下经历过这种情况。
Ben一直以为他能够毫无困难地处理潜水中发生的任何事情，但他没想到他的O形圈爆炸了，时间这么短。
He did some research online and found details of tests run by Advanced Diver 杂志 in the USA. These tests showed that a failure such as Ben experienced would empty a full scuba-cylinder in fewer than 90 seconds. Ben had had no idea.
What does Ben do differently now? He replaces all O-rings as soon as he notices bubbles, and he doesn’t do deep dives alone with just a single cylinder.
他还试图让自己和他的学生更好地了解情况。
