The GBU-31 is a guided air-to-surface weapon autonomously navigates to the designated target coordinates. (U.S. Air Force photo by Staff Sgt. Brittain Crolley)

In November 2014, the U.S. Air Force began development of a version of the GBU-31 JDAM intended to track and attack sources of electronic warfare jamming directed to disrupt the munitions' guidance. The Home-on-Jam seeker works similar to the AGM-88 HARM to follow the source of a radio-frequency jammer to destroy it.

joint direct attack munitions gbu 31/32/38 Mission The Joint Direct Attack Munition is a guidance tail kit that converts existing unguided free-fall bombs into accurate, adverse weather "smart" munitions.

GBU-31, GBU-32 AND GBU-35 JOINT DIRECT ATTACK MUNITIONS (JDAM) TACTICAL MANUAL AND USER GUIDE * * * D R A F T * * * FOR USN SERIES AIRCRAFT F/A-18C/D CDR Ed Gassie, USN JDAM Project Office, Code 47HE00D Naval Air Warfare Center, Weapons Division NAWS China Lake, CA 93555-6100

An inert 2000lb GBU-31 JDAM on the number 3 station of a USAF F-16. (USAF photo) The Joint Direct Attack Munition (JDAM) is a guidance tail kit that converts existing unguided free-fall bombs into accurate, all-weather guided bombs.

GBU-31 Joint Direct Attack Munition (JDAM) The Joint Direct Attack Munition designated GBU-31 is a 2,000-pound class munition guided by an $18,000 tail kit.

The Joint Direct Attack Munition (JDAM) GBU-31 is a tailkit under development to meet both USAF and Navy needs, with the Air Force as the lead service. The program will produce a weapon with high accuracy, all-weather, autonomous, conventional bombing capability.

gbu-31/32/38 jdam Joint Direct Attack Munition is a GPS/INS-guided, autonomous, all-weather surface attack weapon. The joint USAF-Navy program upgrades the existing inventory of general-purpose bombs by adding a GPS/INS guidance kit for accurate all-weather attack from medium/high altitudes.

With the addition of a new tail section that contains an inertial navigational system and a global positioning system guidance control unit, JDAM improves the accuracy of unguided, general purpose...

The Joint Direct Attack Munition (JDAM) GBU-31 is a tailkit under development to meet both USAF and Navy needs, with the Air Force as the lead service. The program will produce a weapon...