The PMA, which represents vessel operators and terminal players who employ dockworkers at 29 west coast ports, has written to the Federal Mediation and Conciliation Service (FMCS) to request mediation in the dispute, the agency said today.

The association has been in negotiations with dockworkers in the International Longshore and Warehouse Union (ILWU) for a collective bargaining agreement that stretches across the US west coast.

The