Could be, depends what you are transmitting. Coordinates doesn’t take much time to transmit and It’s just one of the myriad of connections they have
055 DDG Large Destroyer Thread
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With a data transfer rate of a few characters per minute and the one-way hard limit, I will again state that this method is de facto too slow for what you are insinuating. ELF radio is used for pretty specific, coded commands to underwater combatants (like a ROE change or a command to get to periscope depth and receive orders). It certainly has its use, but not for the things your are thinking about.
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The array can broadcast signals at up to 300Hz, not sure what the data transfer rate possible at 300Hz is, but it seems plenty high enough for various applications. Bear in mind that the signals from command will have lower data sizes than data streaming from the ship.
Another key aspect of the system is this..
We can speculate how these devices might be used in another thread, but presumably 055’s will be communicating with these devices as well, possibly at higher data rates.
Wee are OT but it is fun to think this through.
This article, , explains how data is put on radio waves. Basically you'd go with either AM or FM.
At the max frequency of 300Hz, the highest raw data transfer rate will be 300 bit per second in AM. The rate will be lower in FM. I am not trained in RF so I don't know whether AM or FM should be used for the purpose discussed here. Let's say AM would fit.
From the communication protocol design point of view, to transfer data reliably, you'd need error detection (parity bits, checksum, CRC, etc.) in your data link. It means out of the 300 bit per second, there will be some bits taken. Because this is a one-way broadcast, you would also need error correction. More bits will be used as overhead. To prevent malicious error injection, you'd need stronger error detection/correction which usually means even higher space overhead.
You'd need frames (aka packets) to delimit messages. Each frame will have at least a pair of markers or a marker and a length field as the frame boundaries. The markers must have unique bit patterns to distinguish them from the message contents. The length field must be big enough for the longest messages possible. These are bits gone as overhead.
Compression could help. On the other hand, compression is not free. If the messages are short, the overhead of compression might defeat its purpose completely. On this kind of slow data link, you'd already need to keep your messages short in the first place.
With all these overhead considered, even in AM, the highest data transfer rate you could get from 300Hz would be much lower than the theoretic limit of 300 bit per second. And keep in mind that at 300Hz you wouldn't get the max reach which would be critical for the purpose discussed here.
Far more likely that SATCOMs are used for this networking, particularly these circular domes. These might be transmitting at Internet speeds.
Here is a miniature example of these domes used for motorhomes.
In zh.wikipedia.org the fourth 055 was commissioned in Nov 11, 2021.
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