Reading posts here, or accidents reports, I wonder - who is doing accounting for those operators ? Because it is apparently profitable for them to loose machines and people, than have a reliable communication equipment, and safety gear.
And BTW that 15 minutes survival estimate isn't correct, even without protective equipment, average male could survive up to an hour in those conditions... But calling for Coasties two hours after loosing contact is pure nonsense. After that period of time, there were very little chances of finding anyone alive, actually zero to finding someone who could survive till the next day.