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To be fair I barely trust my InReach either. Overcast days, canyons, and any kind of tree cover consistently result in delayed or failed messages. And even if they report as "sent" on the device sometimes the recipient doesn't get them.

And for a dedicated device, the tracking feature is laughably bad with worse accuracy than my friend's watch.

Better than nothing in case of emergency but the reliability leaves a lot to be desired.

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Are the messaging and emergency functions the same with those? For emergency beacons there is also a ~400Mhz frequency that is monitored independently (vs satellite communication at higher frequencies)

InReach uses the same 16xx Mhz Iridium frequency for everything. It does not have a 400Mhz PLB transmitter (which usually come with extendable antennas by the way, due to the ~ 70cm wavelength).

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