A "pirate captain" refers to the leader or captain of a group of pirates. They are in charge of the pirate crew and lead them in their activities like stealing from ships and causing mischief at sea. Full definition
Meanwhile, his former companions - including Will Turner (Orlando Bloom), Elizabeth Swann (Kiera Knightley), and the newly resurrected Captain Barbossa (Geoffrey Rush)- go to the Orient to enlist the help of Pirate Captain Sao Feng (Chow Yun - Fat). (reelviews.net)
The ultimate rejection of old Hyrule also means the rejection of Zelda's role as damseled princess, and when she surfaces at the end, it's once again as pirate captain Tetra. (grantland.com)
From the game's main website we know that it'll involve starting from the bottom as a wannabe pirate captain with a single ship. (techradar.com)