The command chair, also referred to as the captain's chair or simply the chair, was the most important position on board a starship bridge. This seat, as its alternate name implies, was occupied by the captain of the vessel, or the officer who commanded the vessel in the captain's absence. The ship's duty officer sat on the command chair at all times and monitored all operations on the bridge. The chair was usually equipped with companels and other related equipment. In addition, some versions could swivel, so the commanding officer could easily turn to face any relevant station.