The Cardassian sector was a region of space. This sector was patrolled by Cardassian patrol ships. This sector was adjacent to Sector 21503. In 2367 the USS Enterprise-D was on a mapping survey near this sector. (TNG: "The Wounded" , "The Mind's Eye" ) The planet Draygo IV was located 3.7 light years from Cardassian space in this sector. (TNG: "Homeward" } This sector was only mentioned in dialogue. According to the script, the pronunciation for Cardassian was "car-DASS-ee-en". [1]