Prime Minister Norman Kirk told the crew of the Otago that by sailing to France's nuclear testing area they would act as a 'silent witness with the power to bring alive the conscience of the world'.
The International Court of Justice's ruling was part of New Zealand's long campaign to end French nuclear testing in the Pacific. The French ignored the court's injunction to cease testing.
The Greenpeace ship, which was protesting against French nuclear testing, was torn apart by two bombs planted by French secret agents. A Portuguese crew member was killed.