MV Rena aground on the Astrolabe reef
|Charterer:||Mediterranean Shipping Company S.A. (MSC) (2011)|
|Port of registry:|
|Builder:||Howaldtswerke-Deutsche Werft AG, Kiel, Germany|
|Laid down:||4 October 1989|
|Completed:||1 April 1990|
|Out of service:||5 October 2011|
|Fate:||Broke in two after grounding on Astrolabe Reef, New Zealand, on 5 October 2011|
|Length:||236 m (774 ft)|
|Beam:||32.2 m (106 ft)|
|Draught:||12 m (39 ft) (max)|
|Depth:||18.8 m (62 ft)|
|Installed power:||Cegielski-Sulzer 8RTA76 (21,996 kW)|
|Speed:||21 knots (39 km/h; 24 mph)|
MV Rena was a 3,351 TEU container ship owned by the Greek shipping company Costamare Inc. through one of its subsidiaries, Diana Shipping Co. The ship was built in 1990 as ZIM America for the Israeli shipping company Zim by Howaldtswerke-Deutsche Werft AG in Kiel, Germany. She was renamed Andaman Sea in 2007 and had sailed under her current name and owner since 2010.
On 5 October 2011 the Rena ran aground near Tauranga, New Zealand, resulting in an oil spill. On 8 January 2012 the Rena broke in two after enduring heavy winds and seas overnight. By 10 January the stern section had sunk almost completely.
The Rena was a 236-metre (774 ft) Panamax container ship with a container capacity of 3,351 twenty-foot equivalent units (TEU) in seven holds. Her breadth was 32.2 metres (106 ft), and fully laden she had a draught of 12 metres (39 ft). Her gross tonnage was 38,788, net tonnage 16,454 and deadweight tonnage 47,231 tonnes. The Rena was served by a crew of 20.
The ship was propelled by a single eight-cylinder Cegielski-Sulzer 8RTA76 two-stroke low-speed diesel engine directly coupled to a fixed-pitch propeller. The main engine, which had a maximum output of 21,996 kW (29,497 hp) at 98 rpm, burned 90 tons of heavy fuel oil per day while giving the ship a service speed of 21 knots (39 km/h; 24 mph). For maneuvering at ports the ship was also equipped with a bow thruster. Shipboard power was generated by two 1,240-kilowatt (1,660 hp) auxiliary generating sets.
In the late 1980s the Israeli shipping company Zim launched a major renovation and fleet expansion project, which included ordering 15 new ships. One of the new ships was ZIM America, which was laid down on 4 October 1989 at the Howaldtswerke-Deutsche Werft AG shipyard in Kiel, Germany. Delivered on 1 April 1990 and registered in Haifa, the new 3351 TEU container ship enabled Zim to offer a weekly fixed-day sailing schedule for its customers. The ZIM America was later re-registered under the Maltese flag of convenience in 2004 with Valletta as her home port, and in 2007 she was renamed Andaman Sea.
In 2010 the Andaman Sea was sold to Diana Shipping Co., a subsidiary of the Greek shipping company Costamare Inc. She was renamed Rena and registered in the port of Monrovia in Liberia. In 2011 the shipping company signed a five-year charter for Rena with the Mediterranean Shipping Company (MSC).
2011 grounding and oil spill
On Wednesday, 5 October 2011, at 2:20 AM while sailing from Napier to Tauranga, the Rena ran aground on the Astrolabe Reef off the Bay of Plenty, New Zealand. The ship was carrying 1,368 containers, eight of which contained hazardous materials, as well as 1,700 tonnes of heavy fuel oil and 200 tonnes of marine diesel.
By Sunday, 9 October, a 5-kilometre (3.1 mi) oil slick threatened wildlife and the area's rich fishing waters. Oil from the Rena began washing ashore at Mount Maunganui beach on 10 October. Bad weather that night caused the ship to shift on the reef, and the crew were evacuated. The shifting of the ship caused further damage, resulting in a further 130–350 tonnes of oil leaking.
By 13 October the ship was listing by 20°, and 88 of her 1368 containers had fallen into the sea.
Due to increased pressure to her hull, Rena was expected at any point to split in two, furthering the environmental impact of the disaster. It was reported on 14 October 2011, that Rena had cracked in two, held together only by her internal structure and the reef itself.
On 8 January 2012, it was reported that the Rena had broken in two, and while the bow section remained firmly grounded on the reef, the split had caused both sections to slew away from each other and settle lower in the water. This caused further debris and oil to be released into the sea. By 10 January the stern section had been submerged almost completely, and on 4 April it slipped further down the reef and disappeared completely from the surface.
By June 2014, the wreck has been salvaged of approximately 77% of the initial containers. Major pieces of the wreck have been removed, those include: the entire bow section being leveled one metre below the low tide mark, removal of the 350 tonne accommodation block (down to D deck) and a major piece of port side. All fuel and oils have been removed, except for about 1 tonne of clingage. There is an ongoing search for the last container of plastic beads. During the whole salvage, more than 850 tonnes of debris has been removed from the area.
In a report by the ship's owner it was noted that the anti-fouling paint on the wreck contains zinc, diuron, copper and tributyltin (TBT). The same report noted that there is "localised contamination of TBT in on-reef sediments at Astrolabe". The Sediment Quality Report submitted by the ship's owners as part of their resource consent application to leave the wreck on Astrolabe noted, "Sediment contaminant concentrations on Astrolabe Reef adjacent to the wreck indicates adverse effects on organisms are likely to be occurring due to elevated concentrations of copper, zinc, TBT, and PAHs."
|Wikimedia Commons has media related to Rena (ship, 1990).|
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- Harper, Paul; Donnell, Hayden; Morton, Jamie; Theunissen, Matthew; Zb, Newstalk; Davison, Isaac (2011-10-11). "'Worst ever environmental disaster'". New Zealand Herald. Retrieved 2011-10-11.
- "'Salvage team assesses damage'". Sydney Morning Herald. 2011-10-14. Retrieved 2011-10-14.
- Cheng, Derek; Ihaka, James; Morton, Jamie; Harper, Paul (2011-10-18). "Rena oil spill: Workers brace for death of ailing ship". New Zealand Herald. Retrieved 2011-10-18.
- "Coast under threat as Rena splits up". The New Zealand Herald. 8 January 2012. Retrieved 8 January 2012.
- Rena's stern gone from reef. Otago Daily Times, 4 April 2012. Retrieved 2012-04-04.
- "This is our fourth newsletter to the communities of the Bay of Plenty". The Rena Project. June 2014. Retrieved 20 July 2014.
- Till, Clare (2014). Antifouling Assessment: Proposal to Leave the Remains of the MV RENA on Astrolabe Reef. Safinah. p. 5.
- BENTHIC SEDIMENT QUALITY REPORT – ASTROLABE REEF. Auckland: BIORESEARCHES GROUP LIMITED. 2014. p. 16.