SCE group ER007 SCE group title Emergency Power Emergency generator for emergency power supply to support essential facilities during an emergency following loss of the normal power supply. To provide an emergency power supply to support essential facilities during an emergency following loss of the normal power supply. Typical emergency power supply system comprises of emergency diesel generator At item level, e.g. generator SCE group ER006 SCE group title Helicopter Facilities Helicopter facilities comprise all the structure and equipment required to enable personnel evacuation by helicopter during a major incident. To avoid collision by the helicopter with the installation. To facilitate the evacuation of personnel from the installation to the nearest place of safety. At system level