Your container used to arrive on an MSC vessel at POMTOC every Thursday. Now it shows up on a Maersk ship at South Florida Container Terminal on Tuesday. Nobody told you. Your warehouse crew scheduled for the wrong day, your drayage pickup missed the free time window, and you're paying demurrage. The reason: steamship line alliances reshuffled, and Port Miami's terminal assignments moved with them.
What Steamship Line Alliances Are
Ocean carriers form alliances to share vessel space on major trade routes. Instead of each line running its own ships between Shanghai and Miami, alliance partners load containers onto shared vessels. A CMA CGM booking might ride on an Evergreen ship. A Hapag-Lloyd container might sail on a ONE vessel.
For the carriers, alliances cut costs. Filling a 14,000-TEU ship is easier when three carriers pool their bookings. They share port calls, coordinate schedules, and split the cost of fuel and terminal fees across a larger volume.
For you, the importer, alliances determine three things that affect your drayage planning: which terminal your container arrives at, what day the vessel docks, and how many port calls happen between the origin and Miami.
The Current Alliance Map
Three major groupings control most of the container traffic calling Port Miami and Port Everglades. Knowing which carriers belong to which alliance tells you whose vessels might carry your freight.
What Changed in 2025
The 2M alliance between Maersk and MSC ran for over a decade. Their split forced the biggest reshuffling of vessel routes since the alliance system began. Maersk paired with Hapag-Lloyd. MSC went solo. THE Alliance restructured into Premier Alliance with a tighter membership.
Each change moved vessels between terminals. Routes that called Port Miami on Wednesdays shifted to Fridays. Containers that arrived at POMTOC started showing up at South Florida Container Terminal, or vice versa. Some routes added a transshipment stop in Kingston or Freeport, adding 2-3 days of transit time to shipments that used to come direct.
Miami importers who booked with Maersk for years noticed the difference first. Their containers started arriving on different vessels, at different terminals, on different days. The bill of lading still said Maersk, but the ship belonged to a Gemini partner.
How Alliance Shifts Affect Your Drayage
Alliance changes don't stay at the port. They ripple through your entire inland logistics chain.
Terminal changes alter pickup logistics. POMTOC and South Florida Container Terminal sit at different locations within PortMiami. Different gate hours, different congestion patterns, different chassis pools. Your drayage driver knows the fast lanes at POMTOC but might waste an hour figuring out the yard layout at SFCT. Multiply that across 20 containers per month and you've lost a full day of driver productivity.
Schedule shifts break warehouse coordination. If your vessel arrival moves from Thursday to Tuesday, your warehouse receiving crew needs to adjust. Loading docks that were available on Friday for a Thursday pickup might be booked solid on Wednesday. Your drayage carrier needs advance notice to reallocate drivers.
Transshipment adds transit time. Gemini Cooperation's hub-and-spoke model routes more containers through transshipment hubs in the Caribbean before delivery to Miami. A shipment from Ningbo that used to arrive in 22 days on a direct service might take 25-27 days with a Kingston transshipment stop. Those extra days change when you schedule your drayage pickup and when you need the warehouse ready.
Free time calculations reset. Different carriers offer different free time periods. When your booking shifts from one alliance partner's vessel to another, the free time terms on the bill of lading might change. Three free days at the terminal becomes two. That one day difference, on a container you planned to pick up on day three, turns into a $200-300 demurrage charge.
Terminal Assignments at Port Miami
Port Miami has multiple container terminals, and each alliance tends to concentrate its vessels at specific facilities. These assignments shift when alliances restructure.
Terminal assignments aren't permanent. Carriers negotiate terminal contracts on multi-year cycles. An alliance restructuring gives carriers the opportunity to renegotiate, which can move your container to a different terminal with 60-90 days' notice. Your freight forwarder or customs broker should flag these changes, but many importers learn about terminal switches when their driver shows up at the wrong gate.
How to Protect Your Supply Chain
You can't control which alliances form or dissolve. You can build a supply chain that absorbs the changes without blowing up your drayage costs.
- Ask your freight forwarder for the vessel name and terminal code with every booking, not just the carrier name. "Booked on MSC" doesn't tell you which terminal to send the truck to.
- Track vessel schedules through MarineTraffic or your carrier's online portal. Set alerts for your regular services. When a vessel arrival shifts by two days, you'll know before your driver does.
- Build drayage flexibility into your warehouse scheduling. If your container arrives on Tuesday instead of Thursday, can your warehouse receive on short notice? Talk to your 3PL about same-week receiving windows.
- Work with a drayage company that operates at both Port Miami and Port Everglades. If an alliance shift moves your vessel to the other port, your carrier should handle both without a separate contract.
- Review free time terms every time you switch carriers or your carrier changes alliance partners. The demurrage clock starts on different days depending on the steamship line's tariff.
Alliance changes happen on cycles of 3-5 years, but the effects hit your operations within weeks. The importers who track vessel assignments and keep their drayage plans flexible avoid the surprise demurrage charges and missed delivery windows that catch everyone else off guard.
At One A Trucks, we monitor terminal assignments at Port Miami and Port Everglades for all major alliance services. When your vessel route changes, we adjust the pickup plan before it costs you money. Reach out for a quote if you're managing container moves through South Florida.