The diving boat of Project 23040 is designed for stationary placement of diving equipment, transportation of divers and underwater operations. The vessel can assist in emergency rescue operations, in hydraulic and salvage operations; inspection of harbor seabed, inspection of ship wrecks and other structures. Besides, the boat has fire fighting capabilities for fighting fires on vessels, floating and coastal facilities of total height of up to 30 m, for pumping water from excluded ships; for underwater search and inspection using unmannded ROV; for search of wrecks at depths up to 150 m, using a towed sonar; for man overboard search / rescue using thermal night vision systems; for the supply of power to excluded vessels.

The 23040 series boats are equipped with a decompression system for divers. They provide decompression, air, oxygen and helium regimes of medical recompression. The boat enable divers to work at a depth of 60 meters.

The boat is 28,09 meters long and 5,56 meters wide. The midship board is 3 meters high, the bow is 3,4 meters high. The average draft is 1,5 meters. Full displacement is close to 118 tons. The main engine has a 2x441 KW capacity. The diesel generator has 2x80 KW. The emergency diesel generator has 1x20 KW. The speed is close to 13,7 knots. The crew comprises 3 men and the diving team has 5 men. The range is 200 miles at 10 knots. The boats feature single-deck steel ice-class hull boat, an aluminum superstructure (wheelhouse) and two-shaft diesel propulsion system with FPPs and bow thruster. The boats are for the first time controlled by joysticks which easily keep them in the assigned point in any conditions.

Diving boats of this project served on all fleets of the Russian Federation. In total, more than 20 boats of this type were built.

Diving boat RVK-771 laid down 27 June 2013 at the Zavod Nizhegorodsky Teplohod (ZNT Yard), Bor (yard. No.1104), launched 15 October 2013, commissioned on 2013 and was assigned to the Black Sea Fleet.

Now in service.