Definitions for joint direct attack munition
Joint Direct Attack Munition, JDAM(noun)
a pinpoint bomb guidance device that can be strapped to a gravity bomb thus converting dumb bombs into smart bombs
Joint Direct Attack Munition
The Joint Direct Attack Munition is a guidance kit that converts unguided bombs, or "dumb bombs" into all-weather "smart" munitions. JDAM-equipped bombs are guided by an integrated inertial guidance system coupled to a Global Positioning System receiver, giving them a published range of up to 15 nautical miles. JDAM-equipped bombs range from 500 pounds to 2,000 pounds. When installed on a bomb, the JDAM kit is given a GBU nomenclature, superseding the Mark 80 or BLU nomenclature of the bomb to which it is attached. The JDAM is not a stand-alone weapon, rather it is a "bolt-on" guidance package that converts unguided gravity bombs into Precision-Guided Munitions, or PGMs. The key components of the system consist of a tail section with aerodynamic control surfaces, a strake kit, and a combined inertial guidance system and GPS guidance control unit. The JDAM was meant to improve upon laser-guided bomb and imaging infrared technology, which can be hindered by bad ground and weather conditions. Laser seekers are now being fitted to some JDAMs.
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"joint direct attack munition." Definitions.net. STANDS4 LLC, 2013. Web. 5 Dec. 2013. <http://www.definitions.net/definition/joint direct attack munition>.