NATO secures adoption of submerged drone data comms standard Boffins at NATO have managed to ratify, across the entire alliance, the first ever official standard for underwater digital communications. “This marks the first time that a digital underwater communication protocol has been acknowledged at international level and opens the way to develop many exciting underwater communication …
"Getting 28 nations to agree to a name / acronym couldn't have been that easy either."
I don't know - by the time you get to that stage you've already sorted the really important stuff, like the shape of the conference room table* and what's for lunch, so agreeing on an acronym should be a piece of the proverbial by comparison.
* thinking about it, maybe the US State Department should make an early start and open discussions about this with the Norks someday soon - it'll save time later.
It's already quite a well used acronym.
https://en.wikipedia.org/wiki/Janus_(disambiguation)#Computing
Submarines can transmit UHF without fully surfacing, as well. Like the periscope, the radio antenna (AN/BRA-34 back in my day) is mounted to the end of a hydraulic piston.
Sub comes up to "periscope depth" and raises the antenna above the surface of the water.
Unfortunately, as suggested, such communications were easily tracked via RDF, so the sub didn't say much.
Short range comms were handled by the underwater telephone (analog, acoustic).
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