Some may, some don't. One of the more impressive systems, Florida's SARNET, uses linked microwave repeaters with some short-term resiliency features like battery backup. No internet involved.

But yeah you have a point in general, I wouldn't trust repeaters to stay up in a life-depends-on-it disaster scenario at all. And handheld VHF/UHF is little more than walkie talkies without them, though still incredibly important for local crew communication. HF is definitely the world of possible backup internets.

Some may, a lot don't. One of the more impressive systems, Florida's SARNET, uses linked microwave repeaters with some short-term resiliency features like battery backup. No internet involved.

But yeah you have a point in general, I wouldn't trust repeaters to stay up in a life-depends-on-it disaster scenario at all. And handheld VHF/UHF is little more than walkie talkies without them, though still incredibly important for local crew communication. HF is definitely the world of possible backup internets.

Some may, a lot don't. One of the more impressive systems, Florida's SARNET, uses linked microwave repeaters with some short-term resiliency features like battery backup. No internet involved.

But yeah you have a point in general, I wouldn't trust repeaters to stay up in a life-depends-on-it disaster scenario at all. And HT VHF/UHF is little more than walkie talkies without them, though still incredibly important for local crew communication. HF is definitely the world of possible backup internets.