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LK-16 Project 21900M Murmansk

The icebreaker Project 21900M (also known as LK-16) is a series of three diesel-electric icebreakers destined for the Russian Federation. The project 21900 is developed for large-scale oil tanker assistance, as well as towing, transportation and rescue missions in icy waters.

The 21900M icebreakers are two-deck vessels with an extended tank, with an medium engine room, with two full-rotor helm columns in the stern and a bow thruster, with a built-in superstructure shifted to the nose, a helicopter landing area at the bow and open deck in the stern.

Work as a line icebreaker providing high maneuverability and icebreaking capability (it can move steadily in the ice up to 1.5 m thick).

• Towing of vessels and other floating platforms in the ice conditions and open water;
• Assisting vessels in distress and rescue operations in ice conditions and open water;
• Delivery of necessary equipment and participation in oil spill response operations using its on-board equipment;
• Provision of underwater technical works using equipment and specialized systems installed on board the vessel in the drilling rig and oil platform areas, seabed studies, search and rescue operations;
• Fire-fighting on vessels, drilling and oil platforms;
• Implementation of some other special operations at sea.

Diesel-electric icebreakers with a capacity of about 18 MW of Project 21900 (LK16) are designed to operate as a linear icebreaker while ensuring high maneuverability and ice breakability (continuous movement in ice at a thickness of up to 1.5 meters). The diesel-electric power plant consists of four main generating sets Wartsila 12V32 and two auxiliary Wartsila 9L32. The powerhouse of the icebreaker project 21900M consists of two parts: medium voltage (shield 6.3 kV) and low voltage (shield 400 V). The rated power of transformers is 1600 kVA. The rated power of the parking generator is 760 kW. To control the main power plant, the W-PMS system is used. DEIF Delomatic 4 is used to monitor the auxiliary power plant. Two DEIF Delomatic 4 controllers are used to control two auxiliary generators and four inputs from the MV switchboard. A separate Delomatic 4 controller controls the sectional switch. Low voltage panels are designed and manufactured by VNIIR (St. Petersburg). Two ships of the kind have already been constructed at the Baltic Yard in 2008 and 2009 respectively. The first icebreaker 21900M "Vladivostok" successfully passed the sea trials and was accepted by the customer. The second icebreaker Murmansk was ready for road tests in December 2015, and the third icebreaker Novorossiysk was scheduled to be delivered by December 2016. Another three diesel-engined vessels of the project 21900 were under construction at the Vyborg Yard.

PJSC "Vyborg Shipyard" (VSZ, Leningrad region) on December 26, 2016, FSUE "Rosmorport" transferred the diesel-electric icebreaker "Novorossiysk" project 21900M. The Novorossiysk icebreaker is the final ship of a series of three ships that were built at the Vyborg plant. The head ship of the Vladivostok series was handed over to the customer in September 2015. The second ship "Murmansk" was commissioned in December 2015.

Builder	Vyborg Shipyard
Vessel class	KM?Icebreaker 6 [2] AUT1-ICS FF2WS EPP ECO BWM HELIDECK Special purpose ship
Specifications
Displacement: - full	14,322 tons
deadweight	5340 tons
Length overall	119.4- 119.8 m
Beam overall	27.5 m
height	12.4 m
Minimum draft	8.5 m
Delivered power	17.4 MW
Icebreaking capability ice	1.5 m thick (steady movement in a continuous ice field) 1,3 m reverse
Speed (open water)	17 knots
Autonomy	40 days
Crew	35 people.
Special personnel	22 people.