Peak season is pushing freight volumes and rates higher on container trades between China and the US.
Some lines have deployed extra vessels in an apparent attempt to cash in on the surge in volumes.
Freight rates between China and the US West Coast have risen sharply as shippers have rushed to beat the impact of trade tariffs.
Freight rates for a 40-foot container (feu) this week jumped to $2,097 per feu, compared with $1,210 per feu at the end of June, according to the Freightos Baltic Index (FBX).