Russia advances Poseidon‑armed Khabarovsk submarine
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- Russia is advancing deployment of the Poseidon nuclear torpedo aboard the Khabarovsk submarine, which is currently undergoing fitting‑out in Severodvinsk, as shown by satellite imagery.
- Khabarovsk is a purpose‑built 135‑meter nuclear‑powered submarine that integrates Borei‑class and Belgorod design elements and is believed to carry up to six Poseidon torpedoes in side hangars plus limited conventional torpedoes.
- Poseidon is a nuclear‑powered, nuclear‑armed intercontinental torpedo capable of roughly 70 knots speed, unlimited range via a miniature reactor, and diving to depths of up to one kilometer, allowing it to evade conventional missile defenses.
- Perimeter is Russia’s nuclear command‑and‑control system that can autonomously launch Poseidon torpedoes already on patrol if Russia’s command structure is destroyed, directing them toward US port cities beyond the reach of US anti‑submarine weapons.
- US Navy currently lacks a long‑range anti‑submarine standoff weapon after retiring the UUM‑44 Subroc in 1992, creating a capability gap against threats like the Khabarovsk‑borne Poseidon.
- Norman Polmar notes that Russia plans to build 30 Poseidon torpedoes for deployment on four submarines—two for the Northern Fleet and two for the Pacific Fleet.
- Thomas Siu argues that Poseidon’s integration with Perimeter makes it a semi‑autonomous second‑strike asset, potentially allowing Russia to target US coastal cities even after a nuclear exchange.
Why it matters: Russia gains a stealthy, survivable second‑strike option that bypasses missile defenses, while the United States loses a long‑range anti‑submarine countermeasure, widening the strategic gap in undersea warfare. The deployment also forces NATO allies to reassess deterrence postures, as Poseidon’s autonomous launch capability via Perimeter could target coastal cities without prior warning.
