Yes, if you subscribe for breadcrumbs. I'm pretty sure It sends a location every 10 minutes, but it's been awhile since I've been to the website and I don't have the subscription so it may have changed.
MtnBart01 wrote:It sends a location every 10 minutes...
In the case of the Insomnia Canyon rescue, with 7 canyoneers in their group, even if they had subscribed to that feature it's likely they weren't using it.
And when it didn't work, four of the group continued down-canyon for hours until they could get an intermittent cell signal to call for help.
If I ever do anything it would be a sat phone. Otherwise probably not. Guess I get that from the caving I've done---nothing's gonna help you there, of an electronic nature. I know some work has been done on "Cave Radio" but last I know it was very short distance and only if the cave was basically in a thin layer of limestone or like an open direct lava tube and never got very deep.