3 ms·

Some communication is possible... https://en.m.wikipedia.org/wiki/Communication_with_submarines#Extremely_low_frequency https://en.m.wikipedia.org/wiki/Communi

by kc0bfv 7y ago

Some communication is possible... https://en.m.wikipedia.org/wiki/Communication_with_submarines#Extremely_low_frequency https://en.m.wikipedia.org/wiki/Communication_with_submarine... The VLF section above that one is also relevant.