Tim Mara wrote:

Personal ELT's and EPIRB units require you to activate them manually....if
you're still, after you crash.... able to!

I've activated my ELT not after, but BEFORE any potential
unwitnessed landing. At pattern altitude for an off-field
landing, I've always considered this an emergency. So I pop it
on. If I land safely and happily, I shut it off.

But Tim, your point is good as it relates to ridge soaring or
midairs. In both of those cases, it seems possible to
be knocked unconscious and potentially be at a crash site, bleeding out,
and have an impact activated ELT be useful.

I don't know the story of Peter Masak, however, and don't know if this
was his case...
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Mark J. Boyd