Clear Answer
Adding extra ships to a trade route doesn’t increase the per-trip cargo capacity in Anno 117.
Each ship keeps its own cargo slots, loads and unloads on its own schedule, and never shares storage with the others. When you add another vessel, you’re only increasing throughput — meaning more frequent deliveries, not bigger deliveries. Ships don’t pool cargo or combine slots into one large shipment; every ship runs the trade route independently.
Why Adding Multiple Ships to a Trade Route Doesn’t Increase Capacity
You know that moment when you add another ship to your trade route in Anno 117 expecting everything to suddenly move faster and deliver bigger loads… and then nothing changes?
The route still shows the same cargo, one ship comes back half-empty, another doesn’t load the goods you assigned, and you start wondering if the game is bugged or if you missed some hidden setting.
This happens because each ship follows its own cargo slots, its own timing, and your route setup can easily bottleneck how they load and unload.
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How the mechanic works
Per-ship cargo slots: Think of each ship carrying its own backpack. The trade-route screen shows all the goods you want to move, but every ship can only fill the number of slots it personally has. No shared storage, no combining slots.
Independent cycles: Each ship runs the route on its own loop. So when you add another ship, you’re not making one big delivery — you’re just sending more runs. It’s like having multiple couriers taking turns instead of one courier carrying a giant load.
Cargo columns limit: If your route lists more goods than a ship has slots for, those extra goods will never load on that ship. It simply doesn’t have the space in its “backpack.”
Empty returns explained: A ship can come back empty for a bunch of simple reasons: the island didn’t have enough stock when it arrived, two ships showed up too close together and the first one grabbed everything, storage was full, or production couldn’t refill fast enough between visits.
Quick, actionable tips (immediate fixes)
Stagger departures: Spread out your ships so they don’t all arrive at the island at the same time. If they pile up, the first one grabs everything and the others get nothing.
Match columns to your smallest ship: Only assign as many goods as the smallest ship on the route can actually carry. If it has fewer cargo slots than your route has columns, some goods will never load.
Use bigger ships for big deliveries: If you need one large hit of resources, swap multiple small ships for a larger hull. Bigger ships mean bigger single loads.
Split complex loads: If your route is trying to move half the warehouse at once, break it into dedicated routes. One route per resource keeps everything clean and efficient.
Check production and storage: Make sure the source island is actually producing enough and has the storage space to support multiple ships. If production can’t keep up, extra ships won’t help.
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Comparison table
| Setup | Throughput (goods/min) | Per-Trip Capacity | Best use case |
|---|---|---|---|
| Single small ship | Low | Low | Early game, simple needs |
| Multiple small ships | Medium–High | Low (per trip) | Steady supply, frequent deliveries |
| Single large ship | Low–Medium | High | Deliver many different goods at once |
| Multiple large ships | Very high | High | Late-game scaling |
| Split dedicated routes | Very efficient | Controlled | Complex multi-good chains |
Common scenarios and fixes
Scenario: Two ships are on the route, but only the first one actually loads anything.
Fix: Space their departures so they don’t arrive together, increase storage at the source island, or reduce the number of cargo columns so both ships can actually load what you assigned.
Scenario: A good is listed in the route, but it never loads onto the ship.
Fix: Check the smallest ship on that route — if it doesn’t have enough cargo slots for all the assigned goods, that item will always be skipped. Either use ships with more slots or split the route to separate those goods.
FAQ
Q: Do extra ships need a toggle to increase capacity?
No. There’s no special setting. Adding more ships simply increases how often deliveries happen — not how big each delivery is.
Q: Do multiple ships combine their cargo slots?
No. Every ship keeps its own cargo slots. They never merge into one bigger load.
Q: How can I get larger single deliveries?
Use a ship with more cargo slots, like a larger hull, or assign one big ship temporarily if you need a heavy delivery all at once.
Final summary
Multiple ships on a trade route boost overall throughput by making more independent trips, but they never increase the size of each delivery—use extra ships for steady frequency and larger ships when you need big, single-arrival loads.