Deep Waters: Pakistan’s New Hangor-Class Submarines and the Changing Arabian Sea Calculus

As the first of eight Chinese-built vessels docks in Karachi, the regional maritime balance faces a significant technological shift.

The Karachi harbour has a new, silent occupant. The arrival of the first Hangor-class జలాంతర్గామి (submarine) marks a pivotal moment in the ongoing naval modernisation drive between Islamabad and Beijing. This diesel-electric attack vessel, an export variant of China’s formidable Type 039A Yuan-class, is not just a hardware upgrade; it is the cornerstone of a $5 billion defence deal inked back in 2015, designed to project power far beyond the coast.

A Legacy Reborn

The nomenclature carries a distinct historical weight. The name 'Hangor'—meaning shark in Bengali—serves as a nod to the pre-1971 era when East Pakistan was part of the nation. It also commemorates the original PNS Hangor (S131), the submarine that gained notoriety for sinking the Indian Navy’s INS Khukri during the 1971 war. By reviving this title for its new Hangor-class fleet, the Pakistan Navy is signaling a focus on legacy-driven strategic posturing.

Technical Prowess and Stealth

These vessels are built for endurance. Weighing between 2,500 and 2,800 tonnes, they are equipped with Air Independent Propulsion (AIP) technology. This is a critical edge, allowing the submarine to remain submerged for extended periods without surfacing to recharge batteries, significantly reducing its thermal and acoustic signature. With a top speed exceeding 35 kmph and the ability to dive to 300 metres, these boats are designed to lurk in the shadows, armed with six torpedo tubes capable of launching heavy-weight torpedoes and anti-ship cruise missiles like the Babur-3.

The Manufacturing Roadmap

The acquisition strategy is split into two phases. The primary source of the first four vessels is the CSIC (China Shipbuilding Industry Corporation), which has already delivered the lead boat. The subsequent four will be built domestically at the KSEW (Karachi Shipyard & Engineering Works) under a technology transfer agreement. This collaborative model is intended to bolster Pakistan's local industrial capacity, moving beyond mere procurement toward indigenous assembly.

Why it Matters: The Bigger Picture

For New Delhi, the induction of these stealth-capable platforms into the Arabian Sea and the wider Indian Ocean is a development that requires close monitoring. These submarines, which can house 38 crew members and an additional eight special force commandos, enhance Pakistan’s ability to conduct covert operations and littoral warfare. While the naval balance remains a complex equation, the induction of these Chinese-origin platforms highlights the deepening maritime security architecture of the region. It signals a shift toward a more contested sub-surface environment, compelling regional navies to sharpen their own anti-submarine warfare capabilities in response to this evolving original and article-documented reality.