Communication security

Communicating under water 

Dolphins communicate under water using sound waves that travel great distances. Now, human beings can also communicate under water, using a small device, attached to their hand. This is a vital ability for divers, who have become a major player protecting maritime infrastructure during recent years. Ever since the natural gas deposits were discovered in the Israeli coastline, Hezbollah constantly threatens to damage them. To prevent these attempts, the Israeli navy operates a complete line of defense.