"It's taken a while but the union and the company have worked well together to reach agreement on the relatively few matters outstanding," said union organiser Rudd Hughes.
He said Sunday's arrival of the large container vessel, Constantinos P, in Whangārei with Christmas cargo was not a factor in the settlement.
North Tugz maintained that the situation involved a completely new operating model and contract, and therefore the staff were not losing conditions.
But it was glad the dispute had been resolved.
"We're pleased to have reached a point where our customers can plan with certainty over the busy Christmas and New Year period," North Tugz chief executive Tom Greig said.