Here's a hypothetical:
In track mode, the SPoT sends out a waypoint every 10 minutes for 24 hours.
In 911 mode, it sends out a point every 5 minutes (twice as often as in track mode) until the batteries die (more than a week, if the batteries were fresh when you started) or until you cancel or shut it off.
Now, suppose the typical performance of the SPoT was that one in every 12 messages gets through (worse than the performance that Bananaman describes as a "failure"). And, BTW, much worse than I've ever observed from my SPoT, even wearing it on my belt, that I readily admit is not at all optimal.
That means, in 911 mode, at this really low performance level, one message per hour would get through.
I submit that, THAT would, in fact, save your life. (At least, it would get your location though to the GEOS center, assuming you trust them to notify the correct S&R people.)
Why wouldn't that performance level save your life?
I work for Axonn LLC, the company that designed and manufactures the SPoT Satellite messenger. However opinions expressed here are mine and mine alone and do not necessarily reflect those of SPoT INC. or Axonn LLC.
SpotMaker screwed with this post 04-16-2008 at 12:24 PM