- Researcher: Engines
- Researcher: Rods
- Researcher: Pots
- Researcher: Nets
The quests of this game won't give you enough research parts to finish all of these.
The Travelling Merchant will sell parts from time to time though. Dock to one of the pontoons and check if there are any at the shipyard.
The inventory restocks every day so now you have to sleep till the next morning and check again.