[kenhwang]

From my chats with friends who do SAR, they'd much prefer you use it more casually if its the two way communication kind. SAR volunteers really are a special breed, they're already volunteering to risk their lives to save you and most days don't have incident, so text messages back and forth with the potential for rescue is a bit exciting.

Like, the moment you're sufficiently sure you might be lost or at risk/danger. Then at least they know you're out there and where to start looking from your last known location even if you don't need help yet. They might also be able to trivially guide you for self-rescue instead of the situation escalating into requiring rescue or becoming a much more complex rescue.

But if it's just a simply SOS device, then, well, yeah, it can become a nuisance because that can mean "I'm a bit lost" or "I'm quickly dying" and anything in-between and they have no way of knowing.