Analysis of information sources in references of the Wikipedia article "Hypersonic glide vehicle" in English language version.
The downside is when the [HGV] warhead nears its target, it has less speed and altitude and is therefore more easily intercepted by low-tier interceptors, including potential rail guns.
{{cite web}}: CS1 maint: multiple names: authors list (link)According to Iranian official media, Fattah-2 is a hypersonic glide vehicle (HGV). Compared to a ballistic warhead that travels in a more foreseeable arc, an HGV offers significantly greater mobility as it glides to its target after initial launch.