As a captain, you decide what goes on and when. Through your work, you coordinate the different groups aboard the spelljammer into the most efficient path towards victory. You will also be the main navigator for the spelljammer.
Your responsibilities include being bold and decisive when issuing commands. You are responsible for the spelljammer and it’s crew, both failures and successes. Every captain sits with the axe of mutiny over their neck, which means captains tend to be able to keep people unified and understanding.