So, no matter what you are doing, check your PPO2. If you get distracted, if you stop thinking about what you are breathing, you die. Simple. Just don't let it be you. I really wouldn't want one of you guys to be doing CPR on a body while the Widow looks on. I have never felt so inadequate in my life.

So, next you you are out having a great dive, every time you look at your gauges, just say "Thanks Nigel". If that's his legacy, it's a good one. But I'd rather he was here to tell you himself.