Key takeaways
- A container's journey is a predictable sequence: gate-in, loaded, departed, arrived, discharged, available, outgated, empty returned.
- Ocean-leg milestones are mostly ETA revisions; destination milestones carry the real operational cost.
- Free time typically starts around discharge and stops at outgate — the events that bracket demurrage risk.
- The most valuable signal is a missing or late milestone, not the ones that arrive on schedule.
The origin leg
The first milestones happen before the container ever touches water. They confirm the box has entered the carrier's control and is ready to sail.
- Gate In (Origin) — the loaded container enters the origin terminal. The shipment is now physically staged for export.
- Loaded on Vessel — the container is lifted onto the ship. This is the moment the ocean leg formally begins.
- Vessel Departure — the vessel leaves the origin port. From here, the ETA at destination becomes the number everyone watches.
The ocean leg
During transit, the container itself generates no new events for days or weeks. What changes is the vessel's schedule. Congestion, weather, and berth availability push the estimated arrival earlier or later, and each revision is worth recording.
The destination leg
Arrival is where operations work intensifies, because the clock on demurrage and detention starts here. These milestones drive drayage planning, appointments, and customer updates.
- Vessel Arrival — the ship reaches the destination port. Discharge is imminent but not immediate.
- Discharged — the container is lifted off the vessel onto the terminal. Free time often begins counting from around here.
- Available for Pickup — the terminal releases the box (no holds, fees paid). Only now can drayage collect it.
- Gate Out (Outgated) — the container leaves the terminal on a truck. Demurrage stops; detention on the equipment may begin.
The inland and return leg
For inland destinations, rail milestones appear when coverage exists for the lane. After delivery, the cycle closes when the empty box goes back.
- Rail Departure / Arrival — the container moves by rail to an inland ramp, generating ramp and outgate events where available.
- Empty Returned (Gate In Empty) — the emptied container is returned to the carrier's designated location, ending detention and closing the shipment cycle.
Reading the timeline like a pro
Experienced operators do not read every milestone equally. They watch for the events that carry cost or risk: discharge (free time starts), availability (the pickup window opens), and outgate (charges stop). A gap between two expected milestones — discharged but not available for days, or available but not picked up — is usually where money leaks.
This is why completed shipments should drop out of your active view and exceptions should rise to the top. The milestone that did not happen on time matters more than the ten that did.
Frequently asked
What is the difference between gate out and empty return?
Gate out (outgate) is when the loaded container leaves the terminal for delivery. Empty return is when the emptied container is brought back to the carrier afterward. Outgate typically stops demurrage; empty return ends detention on the equipment.
Why does 'available for pickup' come after discharge?
Discharge only means the box is off the ship. Before it can be collected, the terminal must release it — customs holds cleared, line release granted, and any fees settled. That gap between discharge and availability is a common source of delay.