OVERVIEW: The GBU-28C/B Deep Throat is a short-range, GPS and laser guided gravity bomb designed for enhanced penetration against hardened and buried targets.
 
DETAILS:  The Guided Bomb Unit-28 (GBU-28) bomb is designed to penetrate  hardened targets before exploding, and is reported as being capable of penetrating 30 meters of earth or 6 meters of concrete.  Warhead weight is approximately 304 kilograms.  The weapon has a reported CEP of 9 meters.  

NOTES: The GBU-28C/B incorporates an improved guidance that uses both GPS-aided navigation and laser guidance. The 5,000-pound class BLU-122 warhead provides improved lethality and penetration over the earlier BLU-113 warhead. 

SOURCES: Raytheon Paveway III. (n.d.). Retrieved from http://www.designation-systems.net/dusrm/app5/paveway-3.html ; Guided Bomb Unit-28 (GBU-28) Bunker Buster - Smart Weapons. (n.d.). Retrieved from http://fas.org/man/dod-101/sys/smart/gbu-28.htm ; Guided Bomb Unit-28 (GBU-28) Bunker Buster - Smart Weapons. (n.d.). Retrieved from http://www.globalsecurity.org/military/systems/munitions/gbu-28.htm ; GBU-28 Bunker Buster. (n.d.). Retrieved from http://www.deagel.com/Bombs-and-Guidance-Kits/GBU-28-Bunker-Buster_a001151007.aspx ; Enhanced Guided Bomb Unit (EGBU)-28. (n.d.). Retrieved from http://www.globalsecurity.org/military/systems/munitions/gbu-28e.htm ; Raytheon / Texas Instruments GBU-28 Bunker Buster. (n.d.). Retrieved from http://www.ausairpower.net/GBU-28.html ; GBU-28C/B. (n.d.). Retrieved from http://www.deagel.com/Bombs-and-Guidance-Kits/GBU-28CB_a001151009.aspx




















