Mitsubishi SeaAerial

[Grey Havoc]

http://www.engadget.com/2016/01/28/mitsubishi-seaaerial-seawater-antenna/

http://gizmodo.com/mitsubishi-has-made-an-antenna-out-of-seawater-1755644878

The United States Navy have done some work in this area previously in the form of the Electrolytic Fluid Antenna:
http://www.technologyreview.com/view/421741/navy-antenna-using-seawater-instead-of-metal/
http://www.public.navy.mil/spawar/Pacific/TechTransfer/ProductsServices/Pages/SeaWaterAntennaSystem.aspx

 

[shedofdread]

Interesting... I seem to recall reading about attempts made to use smoke as an aerial on a very early (inter war years IIRC) RPAS. Don't ask me for a source - the best I can do is cite the 'depths of my memory'. Sorry.