>>105728791
>I wonder if the navy does this with sonar like ocean version of Skyking threads in /pol/.
https://en.wikipedia.org/wiki/Underwater_acoustic_communication

every day i am worried that ignorant techbros want to keep us perpetually trapped in a cold war era level of technology because they are not only not aware that anything further exists but are scared of anything more because they do not even understand the 60s shit and think the WWII innovations are cutting-edge today