As I understand it it is because sea water is conductive. But then coax is conductive and radio waves travel along that so is it because with radio waves in air have a differential voltage compared to earth whereas seawater is in contact with the earth and so there is no (or a very small) potential difference between the water and the earth?
If that is the case why do VLF signals work?
Is it also reasonable to think of radio wave in are as being analogous to a very big capacitor and seawater is like shorting out the capacitor?
If that is the case why do VLF signals work?
Is it also reasonable to think of radio wave in are as being analogous to a very big capacitor and seawater is like shorting out the capacitor?