Belzelbub
Contributor
Not sure on the iridium holes.This is an interesting side discussion. What and where are the coverage holes in the Iridium network, or is there a "coverage map" for Iridium that I can find on the web somewhere?
How does the PLB work in remote international waters? Also, in a diver situation, there will be no one to answer any phone if the PLB is triggered. Is there any PLB that allows two-way communication? How do you know if your signal has been received and help is on the way?
PLBs and EPIRBs both work on the same frequencies and using the same satellites. Local response will vary by the location. Some areas are hooked in, and can respond quickly. Other areas, not so much, but you’d still have the same problem with InReach. Problem isn’t that the satellites don’t pick up the signal, it’s that local authorities aren’t equipped to listen or respond
The difference between InReach and PLB/EPIRB are who listens. With InReach and Spot, a private company receives the signal. They won’t be sending helicopters or boats to pick you up. With PLB,EPIRB the International COSPAS-SARSAT program receives the signal and will mobilize resources, or contact appropriate resources. When they get a signal, the first thing they do is try to verify the emergency by calling the numbers listed on the registration.