Explanation: A SART, or Search and Rescue Transponder, is an essential piece of maritime safety equipment. It functions as a 9 GHz transponder. When activated and swept by a pulse from a searching radar, the SART immediately transmits a series of 12 distinct blips back to the radar. This 9 GHz signal falls squarely within the X-band frequency range (typically 8-12 GHz) used by most commercial and many recreational navigational radar systems. Therefore, a vessel equipped with an X-band radar can detect the unique pattern generated by a SART, aiding in locating survivors or a vessel in distress. Options A and C are incorrect because a SART is a transponder, not a performance monitor, and it operates with X-band, not S-band, radar. Option B is incorrect because while it is a 9 GHz transponder, S-band radars operate at much lower frequencies (around 3 GHz) and would not detect the 9 GHz SART signal.