Cost structure / standard tiers
VSAs don't directly set freight rates, but they affect how rate and surcharge changes propagate across nominally different carriers.
| Aspect | Effect Under VSA |
|---|---|
| Freight rates | Each carrier prices independently, but GRI timing often aligns across VSA partners on the same string |
| Slot availability | Allocated by contractual share, not by booking carrier's total fleet capacity |
| Surcharge pass-through | Operating carrier's terminal/THC charges may apply regardless of marketing carrier |
| Tracking/ETA source | Operating carrier's schedule governs actual vessel movement |
Because slot allocation is fixed by contract, a marketing carrier can sell out its allocation on a popular sailing even if the operating carrier's vessel has nominal space remaining under another partner's allocation.
Risk mitigation / operational guidance
When tracking a shipment, identify the operating carrier and actual vessel name from the booking confirmation or bill of lading, not just the marketing carrier's name, since vessel ETA and discharge data will come from the operating carrier's schedule. If a booking is rolled, ask whether the roll is due to the marketing carrier's allocation being full versus an actual vessel/space issue — VSA allocation rolls can sometimes be resolved by rebooking through a different VSA partner with available allocation on the same sailing. For terminal-side charges (THC, chassis fees), confirm whether they're assessed by the operating carrier's terminal regardless of which carrier issued the bill of lading, as discrepancies here are a common source of unexpected accessorial charges. During service disruptions (blank sailings, port omissions), check whether the disruption applies to the entire VSA string or only to specific partners' allocations.