But he said the Maersk Aberdeen would cut short its visit to New Zealand after its Wellington call, instead of sailing on to Lyttelton as originally planned, to unload supplies for the South Island and pick up export goods.
That would be to "get back on schedule" rather than any capitulation to the strike Auckland dock workers.
Wellington's CentrePort chief executive, Blair O'Keeffe, said that although pleased the Employment Court had supported its legal position, "we're disappointed to be in this position and we think many of our workers are too".
"We didn't create this situation but we've worked to resolve it in a reasonable and responsible manner ..."
He said the court decision confirmed CentrePort staff acted unlawfully by not agreeing to work on the Maersk Aberdeen.
The Maritime Union's Wellington branch secretary, Mike Clark, said the union would allow the ship to be worked from 8pm last night as "we are not in the business of disobeying court orders and putting our members' freedom in jeopardy".
He said it was just a case "of losing one battle in the war", and expected other skirmishes associated with the Auckland strike, which began 12 days ago and is due to continue for more than two more weeks.
Prime Minister John Key said yesterday that the Government had still not been asked to intervene in the dispute, which follows a breakdown in collective employment negotiations and a threat by Ports of Auckland to contract out jobs.
It would be an "enormous call" for the Government to do so, even though the ports were important to New Zealand's reputation and economy.
But Importers' Institute secretary Daniel Silva questioned the Government's priorities in changing industrial law last year to avoid potential union disruption to filming The Hobbit yet refusing to become involved in the port dispute. He was unaware of any supply shortages, but said that was because importers were going to great cost to transport goods by air or by rail from ports other than Auckland.
All at sea during dispute
Container ships affected by the dispute:
* Irenes Remedy - discharged cargo in Auckland last week, blockaded in Tauranga at the weekend, heading to Southeast Asia last night.
* Maersk Aberdeen - discharged cargo in Auckland last week, blockaded in Wellington from Friday night until yesterday, due to sail back overseas after unloading and loading freight by court order issued yesterday.
* Lisa Shulte - discharged cargo in Auckland at the weekend, heading to Brisbane yesterday.
Ships due at Auckland's strike-hit Fergusson container terminal today, to be worked by non-union and management labour:
* Maersk Brani, Passat Spring.
Ships bypassing Auckland this week:
* Spirit of Endurance, Merkur Sky, Maersk Batur, Rudolf Schepers, Pescara.