Source: www.unitedafa.org

At long last the company published their concept of a Space Available and Positive Space Boarding Priority Charts, which is available on our website. (.pdf)

As you review the positive-space boarding chart, you may notice a concept of positive space categories, which are based on job classification. These include captain, first officer, ISM, mechanic with subsidiary specific differences noted. It's important to understand, that while their chart indicates "seniority applies: in almost every category, it is applied within specific boarding priority category with, for example, all PS1B being upgraded before any PS4B or PS5B.

Contact your Local Council with any questions you may have on United's charts.