People long went to this invention.
The possibility of diving from ancient times attracted the military, but has long been virtually inaccessible. The first attempts to create a prototype of a submarine appeared in the middle of the XVI-th century.
According to legend, military intelligence with the help of a scuba device was first used by Alexander the great, but clear evidence evidence not. Briton William Bourne in 1578, the year was very close, but the first real project was implemented by Dutch Drabbles only in 1620, the year.
The wooden submarine was powered by oars and can remain under water for several hours. Floats with fixed tube supplying the air inside.
However, the first military submarine was built in 1721, the year of the Russian carpenter Efim Nikonov. The task of the ship was in the approaches to the ships with subsequent sinking. It was used for fuel and homemade “flame throwers”.
The first test of the submarine was held in 1724, the year and ended in complete collapse. Four seamen and myself Yefim miraculously managed to escape from the sunken ship. Then there were two more attempts, and they also ended inconclusively.
Yefim was accused of misuse of public funds and exiled to the status of ordinary carpenter on one of the Volga shipyards. However, St. Petersburg is a copy of his “child”, and referred to as just the world’s first military submarine.
