text: Appendix B
  Figure B-9. Restrictive fire line example
  SECTION III – ADDITIONAL GRAPHIC CONTROL MEASURES
  B-41. Additional graphic control measures can be permissive or restrictive. A graphic control measure is a
  symbol used on maps and displays to regulate forces and warfighting functions (ADP 6-0). These control
  measures include boundaries, phase lines, trigger lines and PAA.
  FIRE SUPPORT AREA AND A FIRE SUPPORT STATION
  B-42. In amphibious operations when engagement groups are formed and separate landing areas are
  designated, the commander, amphibious task force may assign each engagement group commander the
  responsibility for control of naval gunfire support within the area. The officer in tactical command, typically
  the commander, amphibious task force, establishes FS areas and FS stations. A fire support area is an
  appropriate maneuver area assigned to fire support ships by the naval force commander from which they can
  deliver gunfire support to an amphibious operation (JP 3-09). A FS area is normally associated with
  amphibious operations but can be used whenever it is desirable to have a FS ship occupy a certain geographic