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42 Maritime Reporter & Engineering News ? DECEMBER 2013 Imabari Shipbuilding Co., Ltd. com-pleted the 95,000 DWT bulk carrier, RAGA at its Marugame Shipyard. The bulk carrier is unique in that it has ad-opted a next-generation superstructure called the Aero-Citadel, which accord- ing to the shipyard offers signi Þ cant ad- vantages in both air resistance and anti-piracy measures.The Aero-Citadel has slimly stream- lined shape and includes the accommo-dation quarters, engine room, and funnel casing. This superstructure can reduce the wind pressure during navigation by 25-30% based on wind tunnel testing. For example, a Capesize bulk carrier navigating at normal output against about 9m/sec head wind (Beaufort 5 class) will have fuel consumption decreased by 2%. Moreover, the new design incorporates marine use LED lighting in the accom-modation and engine room lighting sys-tems, which reduces the electric power required for lighting by about 50%.The slim, streamlined shape facili-tates turning of the bow of the ship to-ward windward during anchorage and decreases the risk of anchor dragging. All stairs are placed inside the super- structure as an anti-piracy measure, and the entrance on the lower level deck has thick reinforced steel doors. The accom- modation windows are bulletproof, and water cannons are placed on the upper deck to prevent pirate incursions into the accommodation. A citadel facility is pro- vided as a refuge area in the superstruc-ture that can accommodate all the crew for several days, protected by double-layer security doors. The facility is also equipped with communication devices usable even in case of blackout, and ship maneuvering equipment such as stop main engine and steering controls, and can gather information about the ship?s status including video images and sound.Imabari Shipbuilding believes that the next-generation superstructure Aero- Citadel should be applied to all possible types of vessels The accommodation design also in-cludes features in accordance with the SOLAS MLC2006 requirements which will come into effect in near future, such as strengthened noise insulation and vi-bration counter measure.Improved living conditions for crew-members are provided and the wheel-house has widened backward view for safer navigation.Imbari combines fuel efÞ ciency and anti-piracy into its sleek next-generation superstructure Aero Citadel. This superstructure can reduce the wind pressure during navigation by 25-30% based on wind tunnel testing.Bulk Carrier Raga & its ?Aero Citadel? Name ...........................................................RagaType...................................................Bulk Carrier Shipbuilder .............................Imabari Shipbuilding Shipowner ............................Higaki Sangyo Kaisha Length, o.a. .............................................234.9m Length, b.p. ................................................227m Breadth ........................................................38m Depth ........................................................19.9m DWT/GT ......................................95,666/50,615 Main engine ...............Hitachi-MAN B&W 6S60ME-C .........................................(Mark 8) diesel x 1 unit MCR ...................................12,950kW x 101min-1 NCR ..................................11,010kW x 95.7min-1 Speed, Service: .....................................15 knots Complement ....................................................25 ClassiÞ cation ...................................................NK Registry ..................................................Panama MR #12 (42-49).indd 42MR #12 (42-49).indd 4212/9/2013 11:57:54 AM12/9/2013 11:57:54 AM
