Countries led by Russia, US and China employing Supercavitation technologies to develop supersonic Submarines, Vessels, and Torpedoes

One of the biggest problems with trying to get torpedos to travel faster is the fact that water is a thousand more times dense than air, so in order to overcome that resistance researchers have had to try a variety of different techniques. One of the  phenomenon called supercavitation uses cavitation effects to create a bubble of gas inside a liquid large enough to encompass an object travelling through the liquid, greatly reducing the skin friction drag on the object and enabling achievement of very high speeds.  Supercavitating vehicle travelling faster than a passenger jet shall be capable of sailing from London to New York in just five hours. Supercavitation is  also being applied to develop a range of weapons like underwater mine bullets, homing torpedoes, submarines and boats.