SPAWAR Systems Center Pacific has developed a technology that uses the magnetic induction properties of salt in sea water to create UHF/VHF/HF antenna. The purpose of this research is to develop a system that is able to replace an existing or not existing antenna to establish a communication. It can be used as an emergency system, for war ships or fishing boats for example. War ships have typically 80 or more antennas for their communications. If one fails, this system will be able to replace it immediately. It can also be used on land, simply by adding salt in water and running the stream. This is useful for example in case of a disaster, where communications are down for many hours. Follow this link for more info.