305
May 2005

Versatile Boat With Specialized Options

When one hears “off shore energy” in the marine sector, it is the petroleum industry that comes most readily to mind. Now a Shetland vessel chartering company has taken delivery of a boat with specialized equipment to support the maintenance of off shore wind-powered electrical generating units. Serving a function similar to that of Gulf of Mexico jack-up boats the new vessel has two 15-meter spud legs to hold it in position while servicing the wind mills. The portside push bows have a gap to suit the four-meter base of wind-farm piles, allowing the vessel to push up against the pile without fear of sliding off. The harder you push the less motion is felt at the bow of the vessel therefore allowing the safe transfer of personnel and heavy parts, gearboxes or motors which typically weight 6.5 tons. Additional accommodation is provided for service technicians as well.

With UK Governments committed to generating 15% of electricity from renewable sources by 2015 significant growth is expected in the off shore wind-farm market. A representative of Delta Marine, has said, “We have previously undertaken work on offshore wind-farms in Denmark and off the English coast but found our current fleet not ideally suited to the work. The Voe Viking will give us greater flexibility and allow us to take on other aspects of the construction and maintenance of offshore projects.”

Launched from the Damen shipyard at Hardinxveld the Netherlands the boat is built on their Damen Multi Cat 2611 design. The 26- by 11.5-meter vessel is extremely versatile with capabilities in anchor handling, dredger service, supply, towing, hose handling, survey and ship assist. The Voe Viking is classed Bureau Veritas I °Ë HULL . MACH Tug, unrestricted navigation, Nat. Authorities: MCA workboat class 1, 150 miles off shore.

Towing power for the vessel, which is rated with a 33-ton bollard pull, is provided by three Cummins KTA38 M0 delivering a total of 1791 bkW at 1800 RPM to Reintjes WAF 464 gears with 6:1 reductions and turning 1700 m/m propellers in nozzles. The triple engine configuration delivers large power while maintaining a shallow 2.25-meter draft for inshore work. The triple engine configuration allows great versatility in that the two outside engines are used for close and harbor maneuvering while all three can be used for towing and for traveling light, the centre-line engine delivers adequate power for hull speed providing green fuel economy.

In addition to a 30-ton towing winch the vessel has 100-ton anchor handling winch and two 13-ton tugger winches. Delta Marine’s history in marine construction is evident in the thoughtful deck layout and equipment. The crane and deck layout allows floating pipelines to be lifted on board the complete length of the vessel to enable safe connection and maintenance work on the joints. Large anchors, of 16 tons or more can be lifted over the bow and placed aft with the after crane, allowing more workspace forward. The winch layout and placement of two horizontal deck rollers allows all three winches and the 5 ton capstan to be used over the bow or stern. Both cranes can work over the bow, the aft crane being able to lift 14 tons over the stern and 10 tons over the bow. Container fittings welded into the deck are placed so as to allow the vessel to continue anchor handling and crane operations while the containers are in use by, for instance. a dive or survey team.

Hydraulic power is provided by a 400 kW Cummins N14 engine. A pair of 89 kW generators are also Cummins powered. For maintaining position and general maneuverability the boat has a 360 degree 200 kW bow thruster.

The Voe Viking's three main and three auxiliary engines are all Cummins. A Delta Marine spokesman explains that the company chose them because they were satisfied with the performance of Cummins engines on their previous vessel. "We were impressed that we could have them serviced without the use of highly specialised equipment. All that's required is the services of a good engineer," he said, adding that. "We chose the KTA 38M because it is at the low end of its power range and we wanted an engine that would last as long as possible and was easy to maintain. Cummins was the obvious choice for the new build as our men are now familiar with them."

The Voe Viking is the fourth vessel in the company’s charter fleet. ( www.delta-marine.co.uk )

Specifications:
Dimensions
Length o.a. : 26.00 m
Beam o.a. : 11.50 m
Depth at sides : 3.50 m
Draught aft : ± 2.25 m
Displacement : 515 ton (m)

Tank capacities
Fuel oil : 110.00 m©¯
Black/grey water: 9.20 m©¯
Fresh water : 52.00 m©¯
Dirty oil : 1.70 m©¯
Ballast water : 55.00 m©¯

Performances
Bollard pull : ± 33 tons
Speed : ± 10.0 knots

Propulsion system
Main engines : 3 x Cummins KTA 38M0
Total power : 1791 bkW at 1800 rpm
Gearboxes : 3 x Reintjes WAF 464 5,591:1
Propulsion : 3 x fixed pitch propellers in nozzles, 1700 mm
Bowthruster : hydraulically driven 200 kW, 360°

Auxiliary systems
Generator sets : 2 x Cummins 6 BT 5.9-D 89 kVA each
Hydraulic power : Cummins N14-M 400 kW
Transfer pumps : Fuel and fresh water 50 m©¯/hr

Deck lay-out
Deck cranes : 2 x Effer 180.000 3S, 10T at 16 m
Towing winch : 500 m x Ø 36 mm, 30 T pull
Anchor-handling : 100 m x Ø 56 mm, 100 T pull
Tugger winch : 150 m x Ø 20 mm, 13 T pull
Towing hook : 1 x Mampaey 33 T
Spud poles : 2 x Ø 550 mm, 15 m
Bow- / Sternroller: 150 T S.W.L. 5m, Ø 1000 mm
Capstan : 5 tons

Nautical and communication equipment
Radar system : 2 x Furuno FR 1505 MKIII
Compass : Observator MKIV
Gyro compass : Tokimec ESN.110 N
Echosounder : Furuno FCV 581
D-GPS : Furuno GP – 80
GPS : Furuno GP - 33
GPS Chart Plotter: Seiwa Barramundi
Autopilot : Radio Zeeland, Sea Pilot 75
Nav-tex : Furuno NX 500
VHF : 2 x Sailor RT 4822 / DSC
VHF H/Held : 3 x Water proof ICOM
Inmarsat-C : Furuno Felcom 15
SSB : Yaesu – FRG 100
U.P.S. system : APC 1600W – 220V

Accommodation
Comfortable heated and air-conditioned accommodation for 6 persons, in
3 cabins, galley, sanitary facilities, etc. Seating for 12 day
passengers.

For further information:

Delta Marine Ltd.
5 Gladstone Terrace,
Lerwick,
Shetland,
United Kingdom.
ZE1 0EG
Tel: 01595 694799
Fax: 01595 692685
E-mail: Bob@delta-Marine.co.uk
44 (0) 1595 694799
URL: www.delta-marine.co.uk

Richard J. Payne
Marine Technical Manager
Cummins Engine Company (UK) Ltd.
Royal Oak Way South
Daventry, Northanptonshire NN11 5NU
England
Phone: (01) 441 327 886555
E-mail: Richard.J.Payne@Cummins.com

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