was reported that India was planning to arm its Sukhoi Su-30MKI fighters with I-Derby ER missiles to replace its R-77 missiles. Previously, in 2018, it had already been selected for Indian Air Force's HAL Tejas fighter. SPYDER The SPYDER (Surface-to-air PYthon and DERby) is an advanced ground based anti-aircraft missile system developed by Rafael that uses surface-to-air versions of the Python-5 and Derby missiles. Operators Current operators – Shafrir-2 (350 missiles, delivered 1981). – Python-3. – Python-3 (400 missiles, delivered 2001), Python-4 and Derby (200 missiles each, all delivered 2011). – Shafrir-2 (50 missiles, delivered 1978), Python-3 (120 missiles, delivered 1997), Python-4 (280 missiles, delivered 2011) and Derby (60 missiles, delivered 2003). – Python-3 (3000 missiles, delivered 1983, local designation PiLi-8 (PL-8)). – Shafrir-2 (80 missiles, delivered 1989), Python-3/4 (75 missiles each, all delivered 2005), Python-5 (100 missiles, delivered 2011) and Derby (40 missiles, delivered 2010). – Shafrir-2 (75 missiles, delivered 1984), Python-3/Python-4 (60 missiles, delivered 1996), Python-5 (50 missiles, delivered 2001) and Derby (60 missiles, delivered 2003). – Shafrir. – Python-5 and Derby missiles delivered as part of SPYDER system. – Shafrir-2 (100 missiles, delivered 1978). – Python-4 and Python-5 (100 missiles, delivered 2007) and Derby. – Shafrir-1/2, Python-4 and Python-5, (primary user, local designation Zephyr). – Python-5 and Derby with solid rocket booster (part of SPYDER air defense system). – Python-3. – Python-4 (600 missiles, delivered 2004). – Shafrir-2 (450 missiles, delivered 1977). – Python-4 (400–500 missiles, delivered 1990). – Python-5 and Derby (375 missiles each, delivered 2018 as part of SPYDER system). – Python-4 (54 missiles, delivered 2004). Former operators – Python-3 (local designation V3S Snake, delivered 1989 and retired in April 2008), Derby (Local designation as R-Darter or V4). See also List of munitions used by the Israeli Air Force AIM-9 Sidewinder IRIS-T ASRAAM R-73 (missile) Astra (missile) References External links Python-5 brochure at Rafael's official site Derby brochure at Rafael's official site Shafrir-1/2 on GlobalSecurity.org Python-3/4/5 on GlobalSecurity.org Derby on GlobalSecurity.org Federation of American Scientists' website on Python-3 Federation of American Scientists' website on Python-4 Federation of American Scientists' website on Derby Fourth Generation AAMs – The Rafael Python 4 Python-5 Rafael Advanced Defense Systems Israeli inventions Military equipment introduced in the 1960s