New Zealand has warned Japan its whaling programme could come under fresh international scrutiny if a disabled vessel in its fleet leaks oil.
The Nisshin Maru has been disabled since Thursday morning after a fire in its engine room.
Prime Minister Helen Clark said the ship should be towed out of the area as quickly as possible.
The BBC reports she warned of an international backlash if the Nisshin Maru causes an environmental disaster.
Miss Clark is angry that the Japanese refused an offer of help from Greenpeace, whose protest ship arrived at the scene on Saturday morning.
The Japanese have asked the ship, a former salvage vessel, to remain on stand-by. But they are reluctant to accept assistance from environmental activists, who they regard as terrorists.
In her strongest comments yet, Miss Clark indicated on Monday that the New Zealand government's patience is fast running out.
“We believe the ship has to be moved north. Obviously, your first priority in a dangerous marine environment is to safeguard life, and we have a stricken ship, that's an issue. One crew member's life has already been lost,” she said.
“Secondly, we have a huge concern for the environment, a pristine environment in the area of Antarctica where New Zealand has a claim. So we would like to see that stricken ship out of there as soon as possible.”
Repair crews have managed to restore power on the factory ship and now hope to restart its engines.
Greenpeace insists the Nisshin Maru has little chance of making it on its own and fears the weather could easily deteriorate before help arrives.
Maritime New Zealand is adamant a stricken Japanese whaling ship must leave the Southern Ocean, amid ongoing efforts to restore power to the vessel.
A Maritime New Zealand spokesperson says a risk remains and the Nisshin Maru needs to leave the area as soon as possible.
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