I’d be amazed if the use case were exactly the same, such that low bandwidth communication were equally useful in both cases, yes. Beside the fact that Voyager

I’d be amazed if the use case were exactly the same, such that low bandwidth communication were equally useful in both cases, yes. Beside the fact that Voyager 1's 160 bits/s would be luxury for an underwater craft using VLF or ELF. And it apparently bears repeating: communication with a submarine using VLF/ELF is one-way. Such is not the case with a spacecraft, even if the latency sucks.