SSA's DeNike says Port of Long Beach's extension of free time was unfair.
Terminals should be blamed for labor shortages on West Coast, union officials say.
Pacific Maritime Association says slowdown is crippling ports of Tacoma and Seattle.
Employers "hopeful that this will allow us to move toward conclusion of an agreement in the near term."
Ports, airports and railways ready to implement winter contingency plans.
BlueWater Reporting shows 15 of 25 services have some sort of schedule disruption to Oakland, reflecting how delays in Los Angeles and Long Beach have impacted carrier schedules.