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January 2011 www.sname.org/sname/mt LEFT: Varandey underway in ice conditions. ice mechanics was in its infancy. Keppel Singmarine chose to partner with ILS Oy, a well-known Finnish naval architecture rm specializing in icebreaker design. Outline requirements for Varandey Varandey is a special-purpose standby and ice management vessel, the function of which is to provide year-round operations at the oshore oil terminal in the Barents Sea (Varandey area in the southeastern part of the Barents Sea). is includes ice channeling for tankers within the terminal area; assistance to the tanker in maneuver- ing, mooring, and loading operations at the terminal; performing rescue and standby functions; reghting capability; perform- ing oil spill response operations; fullling supply functions; and performing underwa- ter engineering and towing operations in the prevailing ice conditions. The vessel was designed and built in accordance with the rules and under the supervision of RMRS including applica- ble statutory rules and regulations of the Russian Federation. e vessel is designed to make 3 knots continuous speed of advance in 1.7 m of level ice, with 20 cm of snow cover, and is capa- ble of turning 180 degrees in 3 minutes in 1.0 m of level ice. Maximum ice thickness at the terminal can be 1.7 m with consolida- tion approaching 3 to 4 m of thickness and 20 m thick ridges. e vessel must be able to operate independently in these ice con- ditions without assistance. The terminal may be blocked or even surrounded with grounded ice rubble/ridges. e ship would be required to perform ice management duties at the Terminal in order to maintain an easy path for shuttle tankers approach and loading. e ice class must be not less than LL7 as per RMRS classication. The navigation area is unrestricted, and autonomy as per provision and fresh water supplies is not less than 60 days. Autonomy as per fuel supplies is not less than 30 days at the normal 60% capacity level. Automation extent is according to A1 class as per RMRS classication. e vessels equipment and systems shall be designed for water temperatures of +20 to ?2 °C and air temperatures of +30 to ?40 °C. The powerplant is of diesel-electrical conguration. e powerplant capacity and propeller type were determined during the design stage in accordance with the require- ments of the classication society. The vessel is fitted with two azi- muthing stern drives aft and twin bow thrusters. e azimuthing stern propul- sors arrangement is optimized for ice ushing operations. For environmental reasons, all oil tanks are independent of the vessels hull plating. e ships loaded speed in deep waters is at 85% capacity of the shaft power at force- two wave disturbance and force-three wind of not less than 15 knots. e draft suitable for operations at the sea depth up to 17 m. e freeboard minimum is 2.5 m and beam is not less than 21 m. According to its purpose, the icebreaker shall supply the oshore terminal, and shall perform in particular the following duties: equipment delivery/removal; fresh water and provision supply; fuel supply; crew rotation; and liquid/solid domestic and industrial waste removal. The vessels fuel oil capacity is 300m 3 of MGO/diesel, and the deck area is approximately 500 m 2/500 tons of deck load. The deck is arranged for transport and secure lashing of both 20 ft. and 10 ft. containers. The firefighting capacity is class Fi-Fi-1, and the ship is arranged with a hoisting area for helicopter operations in accordance with the International Chamber of Shipping Guide. Varandey has special underwater hull painting using a specially-formulated coat- ing, and has capabilities for gathering, processing, and transferring hydro-mete- orological and ice information. Complete domestic waste treatment is provided onboard the vessel, and temporary accom- modation for up to 30 persons during rescue operations and is provided along with rst aid equipment. For oil spill response readiness, the vessel is tted with a workboat capable of towing an oil boom. e ship is provided with an out- reach deck crane for launching the workboat, plumbing the hold, and supporting oil spill recovery eorts. e vessel has storage for 500 m 3 of recovered uids and is provided with 20 m 3 of oil dispersant via a spray sys- tem for dispersant application from both sides. Varandey is also provided with oil spill response equipment booms, skimmers, hot water, and steam washing machines. The vessel is suitable for underwater operations in ice conditions as evidenced by the moon pool provided, and is also equipped with stern towing arrangements to take disabled tankers under tow. Varandey is equipped with environmen- tal equipment as per clean design specs with zero pollution level. Outline requirements for Toboy The requirements for Toboy are generally similar to those of Varandey , except for the following. Toboy is designed to provide year-round operation of the oshore oil terminal in the Barents sea (Varandey area in the south- eastern part of the Barents Sea) including: Toboy is an icebreaking standby/ supply ship operating in cooperation with Varandey in the Barents Sea. The azimuthing stern propulsors arrangement is optimized for ice flushing operations.