In British Army usage a Fire Support Team (FST) is responsible for directing artillery fire and close air support (ground attack by aircraft) onto enemy positions. The term FST replaced the previous name of Forward Observation Party to reflect the inclusion of fires other than artillery into their control.

The FST can comprise six men

• A FST Commander
• The Team 2IC (second in command) - known as an Ack.
• A Forward Air Controller to terminally control Close Air Support
  Close air support
  In military tactics, close air support is defined as air action by fixed or rotary winged aircraft against hostile targets that are close to friendly forces, and which requires detailed integration of each air mission with fire and movement of these forces.The determining factor for CAS is...
  
  (CAS) and manage airspace.
• Signallers
• Drivers