Joint Direct Attack Munition (JDAM)

The Joint Direct Attack Munition (JDAM) is a low-cost GPS-aided, guidance kit that can be installed on existing free-fall bombs.

JDAM is a guided air-to-surface weapon that uses either the 2,000-pound BLU-109/MK 84, the 1,000-pound BLU-110/MK 83 or the 500-pound BLU-111/MK 82 warhead as the payload.

Each JDAM tailcone kit consists of a guidance-control unit (with an embedded GPS receiver) and a control actuation system (a set of tailfins for in-flight course correction). JDAM...