Yeah, oceanic flights largely use satellite-based CPDLC today, or HF voice as a fallback, but not VOR in any case (which I suspect is the implicated system here).
replyVHF Omnirange (VOR)[1] is unlikely to be involved. VOR stations are not dependent on a network. All they need is power. It's 1950s technology. The big ring of antennas next to US 101 just north of SJC is a VOR.
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