Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. The Vympel R-37 (NATO reporting name: AA-X-13/AA-13 Arrow) is a Russian air-to-air missile with an extremely long range. It has also had the names K-37, Izdeliye 610 and R-VD (Raketa-Velikaya Dalnost, "Very Long Range Missile"), and the NATO codename ''Andi''.It was designed to shoot down AWACS and other C4ISTAR aircraft whilst keeping the launch platform out of range of any fighters that might be protecting the target. Although it was first tested from a MiG-31M, the R-37 is not a replacement for the Vympel R-33 missiles carried by that aircraft; rather, the R-37 is intended for the Su-35BM, PAK FA, and other future fighters.