In 2367, the chart "Starfleet Operations - Sectors 21166-23079" listed the activity of Federation starships in the region of space between sectors 21166 to 23079. This chart was on display in the bridge of the USS Enterprise-D. (TNG: "Brothers" okudagram) In 2369, the chart "Starfleet Operations - Sectors 21538-23079" listed the activity of Federation starships in the region of space between sectors 21538 to 23079. This chart was on display in the observation lounge of the Enterprise-D. (TNG: "Chain of Command, Part I" okudagram) This sector was only mentioned in writing.