Cairns said the company was working hard to ensure shipping that had been relocated to Port of Tauranga as a result of the Auckland dispute remained in the Bay of Plenty. "We'll be doing our best to compete against Ports of Auckland to keep that volume," he said.
In a further escalation of the industrial strife, it was announced yesterday that Maritime Union members will go on three week-long strikes from today through to March 16.
Port of Tauranga said container numbers increased 17.1 per cent to 344,081 TEUs (twenty foot equivalent units) in the half-year, compared with the same period a year earlier.
Container traffic at its MetroPort - an "inland port" in an industrial area of Auckland - rose 10.8 per cent on the earlier period to 80,746 TEUs.
"Auckland importers and exporters recognise that by using MetroPort Auckland they can transport containers to and from their market in a timely and cost-effective way," said Cairns.
Craigs Investment Partners analyst Geoff Zame said Port of Tauranga's half-year result was solid and showed the market share gains the company was making as a result of the Auckland dispute.
Market expectations were for a 25 per cent increase in container volumes for the company's full financial year, Zame said, which would bring the company close to capacity until it got its sixth crane and additional berthage sorted out early next year.
Cairns said that port facilities were getting stretched by the increasing demand.
"We've got the wharf being extended and a sixth crane and a whole lot more straddles coming.
"But there's not a lot of headroom left in the next few months - that would be a fair way to describe it."
However the company said it was well-placed for its second half.
Six new shipping services had been secured during the first half, which the firm said was recognition of its reliability and productivity.
Forestry exports were likely to remain strong, Port of Tauranga said, driven by continued demand from China and India, despite the ongoing strength of the New Zealand dollar.
Parker said full-year after-tax earnings were expected to be in the range of $69 million to $72 million.
Port of Tauranga shares closed up 6c at $10.86 yesterday.