GBU-39/B Small Diameter Bombs
GBU-39/B Small Diameter Bombs

US State Department Approves Sale of Precision Guided Munitions to NATO Agency

The U.S. State Department has made a determination approving a possible Foreign Military Sale to the NATO Support and Procurement Agency of Precision Guided Munitions and related equipment for an estimated cost of $22.7 million. NATO Support and Procurement Agency as Lead Nation has requested the possible sale of two hundred thirtynine (239) GBU-39/B Small Diameter Bombs, Increment I; two hundred four (204) FMU-152 fuzes; two hundred four (204) MK-82 500LB General Purpose Bombs; and fifty (50) BLU-109 2000LB Hard Target Penetrator Bombs, that will be added to a previously implemented case. Also included are smoke signal cartridges; engineering and technical support and assistance; and other related elements of logistical and program support. The total estimated cost is $22.7 million. This sale increases the quantity of precisionguided munitions within NATO and allows for their pre-coordinated transfer in support of national and NATO requirements.

The original Foreign Military Sales (FMS) case, valued at $1.87 million, included forty (40) GBU-39/B Small Diameter Bombs, Increment I. Therefore, this notification is for a total of two hundred seventy-nine (279) GBU-39/B Small Diameter Bombs, Increment I; two hundred four (204) FMU-152 fuzes; two hundred four (204) MK-82 500LB General Purpose Bombs; and fifty (50) BLU-109 2000LB Hard Target Penetrator Bombs. This proposed sale supports the foreign policy and national security of the United States by increasing the flexibility of Belgium, Czech Republic, Denmark, Finland, Greece, Hungary, Italy, the Netherlands, Norway, Poland, Portugal, Spain, and the United Kingdom, twelve NATO nations and one NATO enhanced opportunity partner nation, to contribute to overseas contingency operations.

GBU-39 Small Diameter Bomb (SDB)

The GBU-39/B Small Diameter Bomb (SDB) is a 250 lb (110 kg) precision-guided glide bomb that is intended to provide aircraft with the ability to carry a higher number of more accurate bombs. Most US Air Force aircraft will be able to carry (using the BRU-61/A rack) a pack of four SDBs in place of a single 2,000 lb (907 kg) bomb. The Small Diameter Bomb II (SDB II) / GBU-53/B, adds a tri-mode seeker (radar, infrared homing, and semiactive laser guidance) to the INS and GPS guidance of the original SDB. The GBU-39/B began separation tests on the F-22 in early September 2007 after more than a year of sometimes difficult work to integrate the weapon in the weapons bay and carry out airborne captive carry tests. The SDB is currently integrated on the F-15E Strike Eagle, Panavia Tornado, JAS-39 Gripen, F-16 Fighting Falcon, F-22 Raptor, and AC-130W. Future integration is planned for the F-35 Lightning II, A-10 Thunderbolt II, B-1 Lancer, B-2 Spirit, B-52 Stratofortress, and AC-130J.

The GBU-39/B Small Diameter Bomb (SDB) is equipped with a GPS-aided inertial navigation system to attack fixed/stationary targets such as fuel depots, bunkers, etc. The second variant will include a thermal seeker and radar with automatic target recognition features for striking mobile targets such as tanks, vehicles, and mobile command posts. The small size of the bomb allows a single strike aircraft to carry more of the munitions than is possible using currently available bomb units. The SDB carries approximately 36 lb (16 kg) of AFX-757 high explosive. It also has integrated “DiamondBack” type wings which deploy after release, increasing the glide time and therefore the maximum range. Its size and accuracy allow for an effective munition with less collateral damage. Warhead penetration is 1 metre (3 ft 3 in) of steel reinforced concrete under 1 metre (3 ft 3 in) of earth and the fuze has electronic safe and fire (ESAF) cockpit selectable functions, including air burst and delayed options.