Senior Officer is the second-highest rank a player can have in a crew. Players are generally given the rank of senior officer after a long period of officership, during which they show considerable loyalty to the crew, recruit several new players to the crew, and show good leadership qualities, but the requirements for promotion differ with each crew. Propspective candidates must also have purchased the appropriate badge on doubloon oceans. Senior Officers have all the rights of officers but can also see shanghai points on the crew information page, assign officership without approval from the Captain in autocratic crews, and vote on issues in oligarchic crews. Royalty in flags are generally senior officers or Captains.
Senior Officers are recognized as leaders of their crew, often acting as interim Captain when the Captain away. They are often considered the first mates of a crew.
Depending on a crew's booty shares, senior officers can sometimes be given a bigger share than lower ranks after porting.