The GBU-39 and GBU-53 are also known as

The GBU-39 and GBU-53 are also known as

• A. Small Diameter Bomb (SDB)
• B. Guided Bomb Unit
• C. Smart Bomb
• D. Miniature Bomb

Answer: (A)

These are part of the Small Diameter Bomb family. The GBU-39 and GBU-53 are both 250-pound class bombs with a compact diameter designed for precision strikes and reduced collateral damage, which is what the term Small Diameter Bomb (SDB) describes. The GBU-39 is the original SDB, and the GBU-53/B is the later SDB II variant with an advanced seeker. Using the term Small Diameter Bomb emphasizes their shared purpose and design, whereas other options refer to broader or nonstandard designations.

These are part of the Small Diameter Bomb family. The GBU-39 and GBU-53 are both 250-pound class bombs with a compact diameter designed for precision strikes and reduced collateral damage, which is what the term Small Diameter Bomb (SDB) describes. The GBU-39 is the original SDB, and the GBU-53/B is the later SDB II variant with an advanced seeker. Using the term Small Diameter Bomb emphasizes their shared purpose and design, whereas other options refer to broader or nonstandard designations.