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VILJA
TYPE: Hybrid icebreaking ASD escort tug
HULL MATERIAL: Steel
OWNER: Luleå Hamn – Port of Luleå (Sweden)

Awarded to GONDAN as the result of an international competition amongst world renowned shipyards, this compact icebreaker is the most powerful hybrid escort tug of this size in the world. It is equipped with an innovative hybrid propulsion system featuring diesel main engines, shaft motor/generators and batteries, which grant a great operational flexibility and results in lower maintenance costs, reduced emissions and fuel savings. Fully customized to operate in extreme climate conditions, this tug is designed to perform icebreaking, ice management, escort, ship-assistance, coastal towing, fire-fighting and navigation aids service duties on the icy waters of the northern Gulf of Bothnia.

MAIN PARTICULARS
General information
Hull material Steel
Type Hybrid icebreaking ASD escort tug
Delivery 2019
LRS Class Notation ✠ 100A1 Escort Tug, Fi-Fi 1 ✠ LMC, UMS
Ice Class 1A Super FS, Descriptive Note “Icebreaker”
Dimensions
Length overall 36 m
Beam moulded 13 m
Depth 6.6 m
Draught 7 m
Capacities
Fuel oil approx. 150 m³
Fresh water approx. 18 m³
Water ballast approx. 230 m³
Energy storage: Battery Power Bank 600 kWh installed, fitted for future expansion approx. 1200kWh
Accommodation
Accommodation for 3 to 6 (normal service); 10 people maximum
Cabins 5 single cabins (4 with second pullman bed + 1 pullman bed in office)
PERFORMANCE & MACHINERY
Propulsion / Maneuvering
Propulsion System Hybrid with in-line shaft motor generators
Main Engines 2 x Wärtsilä 8L26, 2720 kW each
Motor / generator – PTO/PTI 2 x Permanent magnet electric motor/generator, 1000 kW each
Main Azimuth Propellers 2 x Rolls-Royce Azimuth Thruster US 355 CP, 3100 kW each
Bow Thruster 1 x Brunvoll Rim Driven Tunnel Thruster RDT-1000-F, 300 kW
Features
Maximum speed Approx. 13,5 kn
Icebreaking capacity Navigation at approx. 3 knots speed through 1 meter ice thickness
Endurance at electric “green” mode 1 hour (Batteries charged to 90% SOC) at slow speed navigation
Bollard pull ahead (diesel-mechanical mode) 85 t
Bollard pull ahead (electric boost) 100 t
Steering force at 10 knots 85 t
EQUIPMENT
Deck / Special equipment
Fire-fighting system 2 x Monitors capacity 1200 m³/hour water – 300 m³/hour foam
Towing winches 1 x Electric forward escort towing winch + 1 x Electric aft towing winch
Tow Pins / Roller 3 pin configuration, hydraulically actuated, integrated roller, SWL 100 t

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