Sector 052 on a mission order
Sector 52 was a region of space. A portion of the Romulan Neutral Zone was located in sector 052/32.
In 2364, the Federation starships USS Tranquillity Base, USS Non Sequitur, and USS Max Plank were ordered by Starfleet Command to increase their sensor drone surveillance in this sector. (TNG: "Conspiracy", display graphic)