"The Babur‑3 would provide Pakistan a 'credible second‑strike capability,'" reads the 2017 ISPR statement that first tied a sea‑launched weapon to Pakistan's strategic doctrine. That claim — and a decade of follow‑up developments — frames a debate inside Pakistan's navy and among its external partners about whether a genuine, assured sea‑based nuclear deterrent is attainable without outside help.
Babur‑3 tests and a technical second‑strike
Pakistan’s 2017 Babur‑3 submarine‑launched cruise missile (SLCM) tests were the first concrete signal that Islamabad could place a nuclear delivery system on or beneath the sea. The Inter‑Services Public Relations directorate described the Babur‑3 as having a range of 450 km and as being launched from an "underwater, mobile platform," and explicitly linked the weapon to a "credible second‑strike capability." A second test followed in March 2018.
Those tests established a technical ability to deliver a nuclear warhead from a submerged platform, but the source material stresses an important distinction: a 450 km cruise missile on a conventional submarine is slower, lower‑flying, and more interceptable than ballistic missiles, and its range places only a narrow band of target territory within reach from the Arabian Sea.
Conventional submarines, SSBNs, and the survivability gap
The Pakistan Navy’s current and near‑term platforms — the Khalid‑class (Agosta 90B) and the Hangor‑class (S26) AIP submarines acquired from China — are conventional boats. Even with air‑independent propulsion, those platforms have constrained patrol endurance and must operate relatively close to shore compared with nuclear‑powered submarines. The analysis in the source emphasizes that nuclear‑powered ballistic missile submarines (SSBNs), armed with long‑range SLBMs, deliver a qualitatively different level of survivability, reach, and credibility.
India is cited as the most relevant comparator: the Indian Navy has commissioned the INS Arihant and INS Arighat and is expecting INS Aridhaman, with the K‑4 SLBM reported at a range of 3,500 km. The source uses this to illustrate the operational maturity and geographic reach an SSBN force provides that Pakistan currently lacks.
The 'hybrid' model and the industrial firewall
Retired Pakistan Navy officials publicly discussed a so‑called "hybrid" model in 2024, in which conventional platforms might be tasked with nuclear delivery. Vice Admiral Ahmed Saeed and Rear Admiral Saleem Akhtar, on a June 2024 PTV program, described the Hangor as a "hybrid" compromise and said it would stop short of an "assured" second‑strike capability, urging a gradual build toward an SSN or SSBN.
But the navy’s industrial strategy — acquiring Hangor‑class boats and pursuing a shallow‑water attack submarine (SWATS) programme to establish domestic construction capacity — has created what the source calls an "industrial firewall." European and allied suppliers such as Fincantieri and Turkiye’s STM are competing for SWATS work; if Pakistan’s conventional submarine programme were perceived as dual‑use for nuclear delivery, those partners would likely withdraw. To protect conventional procurement and co‑development, the PN appears to be clarifying that Hangor and future conventional designs will be reserved for anti‑ship and anti‑submarine warfare only.
Drop Site reporting: China declined assistance
According to a May 2026 investigation by Drop Site News, Pakistan reportedly asked China for assistance to acquire a nuclear second‑strike capability during talks over a potential Chinese military base at Gwadar. The report — not confirmed by either government — says China declined, citing its non‑proliferation commitments and strategic risk.
The source frames that refusal as consistent with the broader pattern of China‑Pakistan cooperation to date: extensive support for conventional naval platforms but no precedent for transfers of naval nuclear propulsion or strategic weapons technology. The reporting notes that an SSBN transfer or major technology assistance would represent a new, costly dimension in those relations and could carry diplomatic consequences for Beijing.
What this means for the Pakistan Navy, PAEC, and Fincantieri/STM
- Pakistan Navy: The PN appears to be preserving a two‑track approach — build a conventional submarine industrial base through Hangor and SWATS while separating any nuclear submarine ambitions into a dedicated program. That separation is intended to protect foreign partners and sustain access to Western and allied suppliers.
- Pakistan Atomic Energy Commission (PAEC): PAEC’s prior reactor work (Khushab series and civilian reactors at Chashma and Karachi) and a past SMR proposal provide a technical foundation, but the source stresses the gap between civilian or production reactors and compact naval reactors — a gap that would require decades of testing, funding, and engineering.
- Fincantieri and STM: European and allied firms competing for SWATS need credible assurances the platforms they help design will not be converted for nuclear delivery. The PN’s public firewall strengthens their ability to participate without facing proliferation‑linked reputational or legal risk.
Pakistan’s sea‑based deterrent debate now turns on that firewall and on whether Islamabad can marshal the funding, fissile material access, and political commitment necessary to pursue a dedicated SSN/SSBN path absent a willing external benefactor. Drop Site’s May 2026 account says Beijing rebuffed a direct request; the record in the source leaves open whether Pakistan will attempt phased domestic development, seek more limited technical inputs, or recalibrate its maritime deterrence calculus in other ways.
https://quwa.org/pakistan-navy-news/pakistans-pursuit-of-a-sea-based-nuclear-deterrent/
