Timely article in the Wall Street Journal regarding the iphone satellite tracking (iphone owners I'm sure knew this!). Article also refers to inreach and SPOT. To the points made earlier, there looks to be some fast-evolving tech in this space. inreach and SPOT do have the advantage of sending messages to contacts but I'd expect Apple and the Android counterparts to get that capability on their phones, too, at some point in the future.
https://www.wsj.com/articles/apples-...3dzSTeNaOB53vw