A precision-guided munition (PGM), also called a smart weapon, smart munition, or smart bomb, is a type of weapon system that integrates advanced guidance and control systems, such as GPS, laser guidance, or infrared sensors, with various types of munitions, typically missiles or artillery shells, to allow for high-accuracy strikes against designated targets.[1][2] PGMs are designed to precisely hit a predetermined target, typically with a margin of error (or circular error probable, CEP) that is far smaller than conventional unguided munitions.[3][4] Unlike unguided munitions, PGMs use active or passive control mechanisms capable of steering the weapon towards its intended target.[5][6] PGMs are capable of mid-flight course corrections, allowing them to adjust and hit the intended target even if conditions change.[1][7] PGMs can be deployed from various platforms, including aircraft, naval ships, ground vehicles, ground-based launchers, and UAVs.[2][3] PGMs are primarily used in military operations to achieve greater accuracy, particularly in complex or sensitive environments, to reduce the risk to operators, lessen civilian harm, and minimize collateral damage.[8][1] PGMs are considered an element of modern warfare to reduce unintended damage and civilian casualties.[9][5] It is widely accepted that PGMs significantly outperform unguided weapons, particularly against fortified or mobile targets.[3][7]
During the Persian Gulf War guided munitions accounted for only 9% of weapons fired but accounted for 75% of all successful hits. Despite guided weapons generally being used on more difficult targets, they were still 35 times more likely to destroy their targets per weapon dropped.[10]
Because the damage effects of explosive weapons decrease with distance due to an inverse cube law, even modest improvements in accuracy (hence reduction in miss distance) enable a target to be attacked with fewer or smaller bombs. Thus, even if some guided bombs miss, fewer air crews are put at risk and the harm to civilians and the amount of collateral damage may be reduced.[a][b]
The advent of precision-guided munitions resulted in the renaming of older, low-technology bombs as "unguided bombs", "dumb bombs", or "iron bombs".
Some challenges of precision-guided munitions include high development and production costs and the reliance of PGMs on advanced technologies like GPS make them vulnerable to electronic warfare and cyberattacks.[17]
^ abcCongressional Research Service (2021).Precision-Guided Munitions: Background and Issues for Congress. CRS Report. https://crsreports.congress.gov/product/pdf/R/R45996
^ abHallion, R. (2024). History and Evolution of Guided Weapons. https://www.airuniversity.af.edu/Portals/10/ASPJ/journals/Volume-38_Issue-1/F-Hallion.pdf
^MEHUL SRIVASTAVA, MADHUMITA MURGIA, AND HANNAH MURPHY, FT (3/9/2022, 8:33 AM) The secret US mission to bolster Ukraine’s cyber defences ahead of Russia’s invasion European official: "instead of communicating solely through encrypted military-grade phones, Russian commanders are sometimes piggybacking on Ukrainian cell phone networks to communicate, at times simply by using their Russian cell phones.
'The Ukrainians love it—there is so much data in simply watching these phones, whether or not they are using encrypted apps,' he said.
The Ukrainians then block Russian phones from their local networks at key moments, further jamming their communications. 'Then you suddenly see Russian soldiers grabbing cell phones off Ukrainians on the street, raiding repair shops for sims,' he said. 'This is not sophisticated stuff. It’s quite puzzling."
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