What is a blank sailing?

A blank sailing is a scheduled departure on a liner service that the carrier cancels. The ship does not leave on that rotation, or skips one or more ports, and the cargo that would have gone on it moves on another sailing or waits.

Why carriers do it

The usual reason is demand. If fewer containers need to move, a carrier may cancel some sailings to keep the ships that do sail reasonably full. Carriers also blank sailings during disruptions, for example when a port is closed or a route becomes unsafe.

How it appears in the record

A blank sailing is a decision about capacity, not a stoppage at a port or chokepoint. That makes it hard to see in daily port or transit counts, and events of this kind are recorded as capacity withdrawals with dates that are often only known to the week or month. We describe what carriers announced and do not claim a measured effect where the data cannot support one.

See the event archive and the trade lanes these announcements usually name.