My thoughts are with the poor bereaved families, especially of the 19 year-old lad. People will always seek adventures, and being rich doesn't mean one deserves to die while seeking them. In one way, I too was relieved that the sub imploded almost instantly, sparing the men from hours of diminishing oxygen and desperate claustrophobic panic. I imagine it will be impossible to retrieve any remains for the families to grieve over.
I also feel great sadness at the deaths of any passengers on ships or boats who drown, including trafficked illegal immigrants.
I actually hate the sea and am frightened of it, despite being able to swim well. 'The Cruel Sea' just about describes my feelings.