No, it's an acoustic wave. Salt water is a good conductor of electricity, as such only ultra low frequency radio has any chance of penetrating more than a few f

No, it's an acoustic wave. Salt water is a good conductor of electricity, as such only ultra low frequency radio has any chance of penetrating more than a few feet, and the antenna needed to pull that off is prohibitively large for an aircraft. Recommended reading: http://en.m.wikipedia.org/wiki/Communication_with_submarines http://en.m.wikipedia.org/wiki/Communication_with_submarines