A water-proof multipurpose submarine apparatus with bicycle-like principle of moving is created by specialists from the St. Petersburg State Marine Technical University. It is sized for two people that can operate it without preparatory training. Now the submarine apparatus "Goluboi Kosmos" ("Blue Space") exists only in form of a miniature work model. An estimated price of the apparatus is 19 000 USD. A ticket for a tourist will cost 50 USD per hour. Taking into account expenditures on servicing the rental station, the invested sum can be repaid in no longer than 3 or 4 months.