This file picture, released by Maritime New Zealand in April, shows the Monrovia-flagged container ship 'Rena' stuck on Astrolabe Reef as it is pounded by high seas off the coast of Tauranga. The Greek owners of Rena, the ship at the centre of New Zealand's worst maritime environmental disaster, agreed on Tuesday to pay up to NZ$38 million ($31 million) towards the cost of the clean-up
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