The anchor was raised to the surface on January 6 and taken for forensic analysis, the National Bureau of Investigation said in a statement the following day.
Diversion of future shipments to West Coast ports would become more difficult and costly if a stoppage was prolonged as ships back-up and remain unloaded, reducing available capacity.
The program dates back to 2019, and was first designed to gather import data on low value shipments from major retailers to better identify counterfeit goods.