A blockade at Melbourne's port continues and has gathered momentum despite Victoria's Supreme Court ruling it must end.
Union officials have ignored court orders and attended an illegal picket blocking access to a Melbourne port.
Maritime Union of Australia officials including national deputy secretary Will Tracey breached a Victorian Supreme Court ruling by attending the blockade on Thursday.
"It's also important as a method of escalating this that officials both at the branch and national level come down here today and defy the court injunctions," Mr Tracey told picketers.
Action at the Webb Dock site of the Victoria International Container Terminal started on November 27 over an MUA member who was sacked after failing a security check.
Mr Tracey said they would see whether the terminal would escalate the issue and charge them with contempt.
"We will take that as it comes," he said.
A spokesman for the terminal said they were monitoring the picket to see whether the court orders were breached.
"We will take whatever action is necessary to deal with it," he told AAP.
Chairs, marquees, ride-sharing bikes and electrical generators were set up as part of the blockade, with people spending days at the site.
The blockade is creating a backlog of millions of dollars worth of goods, including perishables, and has been ruled illegal.
Numbers at the picket line fluctuated on Thursday with some participants declining to declare their union connections.
Members are not allowed within 100 metres of the dock for any other purpose than working or using public roads, the court order states.
Popular Catholic priest and union supporter Father Bob Maguire visited the site.
"If the nice man who runs Webb Dock met with the nice man who's concerned for his worker mates, this dispute would be over by this arvo," he wrote on Twitter.
But the Victorian Transport Association has called on the union to let freight operators get on with their jobs.
"It's belligerence and it's arrogance by the MUA to think that they can just shut down business because they have an issue with one employee and hold a whole supply chain system to ransom," chief executive Peter Anderson told ABC radio.
He said the action had taken industrial relations back 25 years.