Havnen

What is the Harbor?

You'll first notice the construction site for the Harbor once you unlock your first research from the Arctic Future. It will appear on a small island area to the left of your city grid. As a construction site it will not yet be functional, you will need to unlock the "Promethium Extraction" research for it to become a working Harbor.

The Harbor will allow you to select a crew to send on a journey with a ship and bring back a special resource - Promethium. You will need Promethium to progress forward on the Tech Tree, it's a resource you cannot trade with other players and it cannot be plundered as well. To select a crew member you will need to pay 25 Arctic Future goods of a specific type. The crew members themselves have various strengths and weakness which will result in extra effects such as additional or less Promethium, longer or shorter journey time, less or more ship damage, etc.

In the image above you can already see the stats for your next journey (-15% damage, 50 Promethium, 1 day for the trip). The standard damage is 15% per trip, though it can go up or down depending on the crew you have selected. Whenever your ship returns from a journey, you can switch to the "Repair" tab in the Harbor and if your ship has reached a damage threshold you will be able to repair it using goods. There are several damage thresholds and the more damaged your ship becomes the less Promethium it will bring back but also the journey time will be longer.

If you choose not to repair your ship at all, you will still get Promethium but a very small amount and the journey will be very long.