The FGSU is an integral part of the Try Ops section. It is commanded by a DF&RS Stn O (OC FGSU) and comprises of 8 DF&RS firefighters (LFF/FF) and 5 civilian craft auxiliary staff.

The role of FGSU is to support the many aspects of training carried out at MOD FSCTE Manston.  These tasks include vehicle support right through to the basic maintenance and operation of the simulators in use at Manston.  Fire ground staff are also trained to maintain all the ancillary equipment used in the training environment such as breathing apparatus, ladders, lines, cutting and lifting equipment, hoses and most any other equipment used in firefighting.

The facilities operated by FGSU include:
Hothouse training unit.
Rescue set (purpose built house used for SAR training)
Hospital wing (used for BA training)
Drager cages for confined space training
Multi simulator wide bodied aircraft.
Fire screen (simulating a side section of a bulk fuel storage tank)
Under wing and cylinder simulators
Tray and large bund fires are also set-up and managed by the FGSU staff.
FGSU also supports the trials facilities used at MOD DFTDC Manston.