The bow section of the stricken container ship Rena remains above water about 14 nautical miles (22 km) from Tauranga on the east coast of New Zealand’s North Island in this April 4, 2012 handout picture. The remains of the ship are stuck on a rock reef six months after it ran aground, in what authorities say is one of the nation’s worst environmental disasters. REUTERS/Maritime New Zealand/Handout (NEW ZEALAND – Tags: DISASTER ENVIRONMENT MARITIME)

The bow section of the stricken container ship Rena remains above water about 14 nautical miles (22 km) from Tauranga on the east coast of New Zealand’s North Island, in this April 4, 2012 handout picture. The remains of the ship are stuck on a rock reef six months after it ran aground, in what authorities say is one of the nation’s worst environmental disasters. REUTERS/Maritime New Zealand/Handout (NEW ZEALAND – Tags: DISASTER ENVIRONMENT MARITIME TPX IMAGES OF THE DAY)

The bow section of the stricken container ship Rena remains above water about 14 nautical miles (22 km) from Tauranga on the east coast of New Zealand’s North Island in this April 4, 2012 handout picture. The remains of the ship are stuck on a rock reef six months after it ran aground, in what authorities say is one of the nation’s worst environmental disasters. REUTERS/Maritime New Zealand/Handout (NEW ZEALAND – Tags: DISASTER ENVIRONMENT MARITIME)