China's Sea-Skimming Hypersonic Bid Hits Engineering
Get the Geopolitics newsletter
Daily geopolitics — wars, elections, sanctions, the diplomatic moves that move markets. Free.
- Chinese Academy of Sciences launched a low-altitude hypersonic flight research program this month, led by its Institute of Mechanics with the University of Science and Technology of China and the Ningbo Institute of Materials Technology and Engineering, to develop foundational technologies for a Mach 5+ sea-skimming missile using detonation combustion.
- China's existing hypersonic arsenal totals roughly 600 weapons per a leaked 2025 US military assessment, a small share of the People's Liberation Army Rocket Force's approximately 3,450-missile stockpile — which Lt. Gen. James Adams detailed in April 2026 testimony as 1,300 MRBMs, 900 SRBMs, 550 IRBMs, 400 ICBMs, and 300 GLCMs.
- David Wright and Cameron Tracy warned in the March 2024 Bulletin of the Atomic Scientists that low-altitude hypersonic flight generates drag that could make such weapons no faster — potentially slower — than traditional ballistic missiles, with Mach 5 producing 100 times the heating of Mach 1 sustained for up to 30 minutes.
- The proposed weapon would exploit the radar horizon to drastically shorten detection range and warning time, and fits into a broader Chinese multi-layered swarm strategy in which submarines fire hypersonic anti-ship missiles at Aegis destroyers, decoy drones exhaust interceptor stocks, and low-flying follow-on weapons finish off carrier strike groups.
- The US Navy's counter approach centers on stealth rather than speed, fielding the AGM-158C LRASM — a wave-top anti-ship missile that relies on information dominance to slip through gaps in enemy air defenses undetected, rather than Mach 5 velocity.
- The kill chain behind the missile may be the real vulnerability: space-based sensors, coastal radar stations, and underwater cables are attackable nodes whose destruction could leave China able to launch hypersonic missiles but operating with a disjointed, degraded kill web.
Why it matters: The article's central message is skepticism: the missile concept collides with Mach 5 heating sustained for 30 minutes, drag that could slow it below ballistic-missile speeds, and a Chinese hypersonic inventory of roughly 600 weapons against a PLARF total near 3,450. For US Navy planners, the actionable threat may be the kill web (sensors, radar, underwater cables) rather than the warhead itself, shifting defensive priorities from missile defense to targeting-network resilience.
Ask SkimNews
