He made over 420 dives, held under water 3890 hours, sank to the bottom of the North pole to search for scientific evidence about the origin of the Arctic ocean at a depth of 4261 meters. He found the submarine "Komsomolets". Yevgeny Chernyaev is a Russian engineer and commander of the deep-sea submersible «Mir-2» , one of the most experienced diver of world.