What's interesting to me now is things like the spot, which also have a button that basically can be agreed upon to say - 'I am ok, but delayed. Don't panic just yet'.
There was a case recently where SAR was activated and the guy was 'saved' - however he had essentially been delayed by a river rising, so stayed in a cabin an extra night.
While he had a PLB, he didn't activate it, as he didn't feel he was in need of assistance. A spot could have signaled to interested parties (intentions form) that he was ok, just going to be an extra night or so.
The disadvantage with spot systems though is that they are still commercial in nature and don't have access to the same standard/network of satellite systems...
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