In 2008, the Ministry of Defence ordered SPYDER-SR batteries along with 75 Python-5 SAMs and 75 Derby SAMs. They were all delivered during 2011 and 2012. The Republic of Singapore Air Force Surface-to-Air PYTHON-5 and DERBY-Short Range (SPYDER-SR) ground-based air defence system is an all-weather air defence system that forms part of the 3rd Generation RSAF Networked Air Defence capability that builds upon the existing multi-layered air defence system to further strengthen Singapore’s air defences. It is a quick-reaction surface-to-air missile system capable of engaging a wide spectrum of aerial threats ranging from fighter aircraft, helicopters and Unmanned Aerial Vehicles (UAVs) to precision-guided missiles which are fitted with infrared imaging and radio frequency seekers. It is also equipped with a 360-degree engagement capability and is able to engage multiple aerial targets simultaneously. Current operators of the SPYDER missiles system include India, Georgia, Peru, Vietnam and Singapore.