How can we addres the challenge of sudden decay considering EM waves in seawater?
Can we assume constant propagaion velocity of EM waves in seawater?
Can conduction current be useful for long range communication or displacement current is the only option?
Can we launch EM wave directly in seawater?
Can increase in frequency at launch of EM wave play a role in minor increase in Pt?
Does transition frquency variation change the propoerty of seawater medium?
EM waves in seawater only work for very low frequencies(submerged submarines) ..such as 77 Hz. the attenuation is HUGE for microwaves say 1 ghz the penetration depth is just a few 10 cm or so.
All that problems were seriously investigated and to some degree solved being applied to communication to submarines already in WWII, e.g. using 15..25KHz with 1MW power https://www.youtube.com/watch?v=OSNCvJN5Xoo
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