Locked-out members of the Fish, Food and Allied Workers' Union (FFAW) blocked a replacement crew of workers from boarding an Ocean Choice International fishing trawler, in the union's latest skirmish with the company.

A replacement crew of about 30 non-unionized workers for the trawler Newfoundland Lynx arrived in Bay Roberts at about 9 p.m. Tuesday.

They were faced by a picket line manned by the locked-out OCI trawlermen.

A bus carrying the replacement workers waited about eight hours just outside the property owned by Harbour International, which won a court injunction to keep pickets off its property.

The bus, meanwhile, was accompanied by an RCMP cruiser, with Mounties also stationed near the picket line at the wharf.

At 4 a.m. on Wednesday, the busload of workers left Bay Roberts without trying to cross the line.

Greg Pretty, a union representative for the FFAW, says it was a long but successful all-nighter for the union.

"Two people jumped (off) the bus," said Pretty. "So we have two people who told us that they're finished with the scab bus. It was a mistake. They're not going back, and it was a bad idea to start with."

Pretty said the locked-out crewmembers will maintain their picket line near the Newfoundland Lynx.

He believes OCI is determined to go fishing, and expects the company to make another attempt to put replacement workers on the vessel.