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HDBTHard and Deeply Buried Target
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Hardening of critical fixed sites might include building aboveground HS submarine pens, aboveground HS aircraft shelters, and deep-underground HS fuel- and ordnance-storage facilities, as well as deep-underground HS or HDBT shelters for theater-strike missiles, personnel, and base-repair kits.
When fitted with a glide kit, the 250-pound SDB has a predicted standoff range of 60 miles, making the weapon highly effective against soft components of an access-denial IADS; however, it lacks the penetration to destroy an HDBT. (13) Though a welcome addition to the inventory, issues of cost, feasibility, and combat potential make investment in the FB-22 a risky proposition, given efforts to field other systems already over budget and behind schedule.