I know when I or my son are in trouble help will find us without a nationwide search!
When we return home he (16 years old) double check his land navigation skills by checking his location marks since I bought unlimited tracking as our service plan.
His mother knows he is safe when he is with me down range four states away with his OK checks.
Whether we are snowshoeing, canoeing, backpacking, climbing or just out camping our loved ones know where we are and that we are OK.
I use it to plan my trip and my family can track my progress and know if I'm off coarse that something may be wrong. I rarely vary my plans but any deviation is good to be noted!
Sometimes slow on the upload and sight sending, or maybe we can't sit still long enough when marking or getting started.
Although, when I can't get a cell signal I know I can hit the help button to get resupplied
I know of none other than Mariners on fishing boats and those supposedly don't work inland.