The real way to save lives is to have the night watchman be a tad less, uh, fictional.
It's a natural human tendency, as we try to make sense of things and understand, to create scenarios where if only something that DIDN'T happen HAD happened, then the thing that DID happen WOULDN'T have happened.
I have seen too many posts now state with certainty that if only there had been a night watchman patrolling the entire boat, then both the
Conception and
RS1 fires would never have happened or would have at least been discovered in time and everyone would be alive. It's a nice thought and maybe gives you comfort and helps you make sense of things as well as gives you someone (the boat owners) to blame and to direct your anger that this situation occurred. But relying on that scenario as savior requires you to not fully explore the options and ignore these possible scenarios:
1. Night watchman is on rounds on the lower deck when the fire breaks out and quickly spreads, and is trapped below along with everyone else, he is unable to sound an alarm, and the end result is still the same.
2. Night watchman is on rounds on main deck right next to charging station when the fire breaks out and quickly spreads, the explosion of the batteries kills him instantly, he is unable to sound an alarm, and the end result is still the same.
3. Night watchman is on rounds on the upper/wheelhouse deck when the fire breaks out and spreads quickly but he is unaware of said fire because he's up in the wheelhouse, doesn't sound an alarm because nothing seems amiss until it's too late, and the end result is still the same.
There is no perfect system. There is no perfect solution. And there's no way to take the human factor out of this which means no matter how many redundancies you build in, human fallacy can thwart the quest for perfection.
To me - and I can't emphasize this strongly enough - the key question isn't about the watch or lack thereof (no question that's a problem) or even the source/cause of the fire (also important) but:
WHY DID IT SPREAD SO QUICKLY? TWICE!!!
These are supposedly built with materials and to standards that have some measure of fire retardency in them so that IF a fire breaks out, people have time to get off the burning ship. Obviously they didn't have time to get off in the case of the
Conception and they barely had time to get off - and one did not get off at all - in the case of the
RS1. How is it that this horrible thing that's not supposed to happen and which has stolen the lives of our friends has not only happened . . .
BUT HAPPENED TWICE!!!
The answer to THAT question is what's going to save lives.