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Feature 6 | GREEN CRAFT TECHNOLOGY


spill recovery equipment will be delivered by Lamor Corp. In heavy seas, the oily water is lead


using one oil boom on the starboard side into a Kahma-type wave damping tank arranged across the width of the vessel, which is equipped with wave damping internal walls. From the inner end of this tank the oily water is lead to Lamor’s oil separation system. Te new system has been model tested


to scale on the icebreaker Bothnica and will be fine tuned by new model tests during the design period of the new vessel. A separate system for oil recovery in


icy conditions has been developed by the Finnish Environment Institute, and will be placed in containers on the open working deck aſt. It is based on a rotating cylindri- cal brushing device fitted on the end of a crane boom, reaching out some 10m from the vessel’s side. Te cylinder diameter is some 0.5m, and the length some 1.5m.


Icebreaking Te moonpool is arranged with a separate ice f lange which can be lowered 1.5m below the hull of the vessel, in order to stay operable when the vessel moves in ice. It also has a hydraulically-operated closing gate. Te specified icebreaking capability of


the vessel is 0.5m thick level ice with a speed of 7knots, and 1m thick ice with a speed of 3knots. Te speed in a channel with on a 1m layer of broken ice is to be 9.5knots. In addition, the vessel is to be capable


of charging through 5m-thick rafted ice in one charge when the initial speed is 7knots. Te speed in open water will exceed 13.5knots. The final ice model tests are to be


carried out at the test basin of the Helsinki University of Technology, and open water tests will be carried out by VTT Technical Research Centre of Finland.


Baltic oil recovery capacity Te Finnish Government currently has 14 vessels capable of oil spill recovery duties. Two of these vessels are operated by the Finnish Navy, three by the Finnish Coast Guard, and the remain- ing nine by Finstaship, the operator of the Finnish icebreaker fleet. In addition,


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This multi-purpose ice-going environmental protection vessel has the highest oil recovery capacity in the whole Finnish fleet.


the community of the Åland Islands has one vessel. Te newbuilding will have the highest


recovery capacity in the fleet, and is the only one fitted with chemical spill recovery equipment. Although Finland is relatively well-placed regarding recovery equipment in comparison with neighbouring countries, the equipment is still not sufficient - even with the newbuilding - to handle a major oil


tanker accident in the Gulf of Finland. In the scenario of a tanker disaster,


the goal will be to recover 30,000tonnes oil in three days. At present, this task is impossible to achieve with only the capacity of the Finnish f leet, and is very difficult to achieve even with oil combating assistance from neighbour- ing Baltic countries, especially in wintertime, when much less oil can be gathered. SBI


Ship & Boat International May/June 2008


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