2006-09-12 21:33:11 · 4 answers · asked by Anonymous in Science & Mathematics ➔ Engineering
They transmit and receive on the VLF band or Very Low Frequency. Check on the Web for information on places like Jim Creek Naval Radio Station. They have huge water-cooled vacuum tube transmitters and a antenna array hanging on a canyon.
2006-09-13 02:23:11 · answer #1 · answered by frieburger 3 · 1⤊ 0⤋
under water they use very low frequency wave.
above water communications is done with high freqency waves.
the difference is because of the transmission medium.
under water the water molecules can not oscillate as fast as air molecules above water. its very complicated.
2006-09-12 22:24:34 · answer #2 · answered by 987654321abc 5 · 1⤊ 0⤋
waves generated inside water
2006-09-13 00:15:28 · answer #3 · answered by sami1989 2 · 0⤊ 0⤋
either using their regular antenna. or on greater depth most subs can float a radio bouy.
2006-09-12 21:40:28 · answer #4 · answered by peter gunn 7 · 0⤊ 0⤋