Connect a dock output to a destination
To auto-unload cargo, connect a station dock's output to a belt and give the belt somewhere to deliver the item. Start with one material and a destination you can inspect. Watch for the item on the station side after docking.
Use a filter for a dedicated output
Players discussing dock unloading on the Main Sequence Steam forum reported configuring a specific item on a dock port. Use that approach when an output feeds a line that needs one resource. For example, send ice along a dedicated line and verify that a ship carrying ice actually supplies that belt.
Check the selected port as well as the selected item. If you test the wrong belt, a correct filter can look as though it did nothing.
Observe a transfer before adding a schedule
Bring in a ship with a small load and inspect the cargo before and after the stop. Look for the same item leaving the ship and reaching its intended station destination. If it appears on the belt but never arrives, follow the belt to see where it stops. If no item leaves the ship, return to the dock's output setup and cargo availability.
Add autopilot after that transfer works. When you run the scheduled route, watch the first arrival to see whether it repeats the successful test.
FAQ
Where do I start if nothing unloads?
Verify the ship carries the item selected on the port. Then check the belt connection and the receiving side.
Can a dock handle different items?
Players reported using separate filtered ports or sorting a mixed belt downstream. Verify which arrangement works in your build.
Do I need autopilot to test the dock?
Test with one observed stop first. That gives you a baseline for diagnosing the scheduled route.