Also, an external GPS communicator has the benefit of having an extraordinarily long life. You can leave breadcrumbs for days, send a few text messages, and alw

Also, an external GPS communicator has the benefit of having an extraordinarily long life. You can leave breadcrumbs for days, send a few text messages, and always have juice for an SOS if you are deep into the backcountry. The Apple SOS is likely going to be used by day hikers and dog walkers who aren't anticipating any real challenges.