Sometimes nothing could have been done anyway. Sometimes, it's just one's time to go.
My one fear in life is of dying stupidly. Perhaps that is why I haven't gotten complacent about dangerous jobs, hobbies, etc. Perhaps, it just hasn't been my time to check out, yet.
I understand how you feel, even when death has claimed someone that you never knew.
It's time for some beers and de-briefing perhaps, Martin.
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QMC, USCG (Ret)
The best luck is what you make yourself!