Russian state television trumpeted the successful dive, saying Russia could soon lay claim to 460,000 square miles of underwater territory.
Members of Graves' party saw him emerge from the water after an apparently successful dive on Monday afternoon.
That camaraderie is evident after a successful dive as several dozen revelers, including safety divers and fellow competitors, celebrate a record.
In its report, the polar team said its successful dive marked one of the last geographically significant "firsts" for humans on Earth.
Successful dive tourism depends on healthy reefs and if there is economic benefit to local communities via dive tourism, there is often increased awareness and measures put in place to sustain healthy reefs".
Simulation and experimental results show that the controllers designed in this paper can achieve speed control and displacement control with high precision and strong adaptability, thus leading to successful diving and leveling control of the underwater tension leg platform.
Firsts are ever more specialist and technically defined - first successful dive at the north pole (Joseph MacInnis), first person to jetpack across the English Channel (Yves Rossy), oldest woman to climb Everest (Tamae Watanabe).
The first cave dive was attempted at Swildon's Hole in 1934, and the first successful dive was achieved the following year at Wookey Hole Caves, which has the deepest sump in Britain at 76 m (250 ft).
