For each port call the published ETD and ETA sit beside the observed ATD and ATA. The difference is calculated and shown in days. The shipper sees where the voyage is running behind before the carrier updates its schedule. Bookings on that vessel are listed under the voyage, so one late port call is read against the shipments it affects.

The system compares the observed vessel position with the planned schedule and raises a delay when the gap crosses the threshold set for the account. The record shows the original ETA, the revised ETA, the port where the delay occurred and the evidence used. The operator confirms the cause, notifies the receiving site and records the next step. The shipper's team sees who owns the delay and what has been done.

The carrier's roll notice is matched to the booking and raised as an alert with the original vessel, the new vessel offered and the change in arrival date. The operator checks the alternative against the contract terms, confirms the price and submits the rebooking. The shipper reads the alert, the decision and the new sailing in one place, with the free-time clock recalculated for the new arrival.