Hanjin Shipping Co.’s vessels are getting stranded at sea after the South Korean container mover filed for court protection, roiling the supply chain of televisions and consumer goods ahead of the holiday season.

A port slowdown and eight months of fruitless labor talks with longshoremen have brought West Coast port congestion to the point of a breakdown, according to representatives of shipping companies.

Southern California’s largest ports, Los Angeles and Long Beach, which handle 40% of U.S. imports, are taking steps to reduce cargo congestion that has slowed the delivery of goods across the country.