The alcove at the rear of the bridge of Enterprise NX-01, built around a table display, where the senior officers gathered to review sensor data and plan operations.
The situation room is the area at the back of the bridge on Enterprise NX-01. It has no walls of its own; it is an open alcove a step away from the command stations, centred on a standing-height table with built-in screens and backed by large wall displays.
NX-class ships have no separate conference room, so this is where Archer calls his officers together. Star charts, tactical plots and scans of alien ships are brought up on the table while the staff stand around it, which gives briefings in the series a hurried, working look.
The set is used from Broken Bow onwards and appears in nearly every episode. During the Xindi mission much of the detailed analysis moves to the new command centre, but the situation room stays in use for decisions made in the middle of a crisis.