Lyttelton Port Co workers belonging to the Rail and Maritime Transport Union (RMTU) will begin striking again later this month as the union and maritime hub operator remain in dispute over pay and rosters.
RMTU members went on strike for five days last month after talks broke down, and today the RMTU said it will strike again for five days from April 20.
The port is offering a 3 per cent wage increase each year for three years, with no roster changes.
The union wants its members to get a 4 per cent increase in the first year, the same deal as members of the Maritime Union of New Zealand (MUNZ).
However, the port says it cannot give the RMTU workers the same pay as the MUNZ workers unless they also accept the roster changes which MUNZ has agreed to.