Khalid-Class (Agosta 90B) Submarine: Pakistan Navy’s Backbone Since 1999

Why It Matters

The enhancements preserve Pakistan’s under‑sea deterrent and fill the capability gap until the Hangor fleet reaches full readiness, influencing the strategic balance in the Indian Ocean region.

Key Takeaways

• Khalid-class built under $950 M 1994 deal with French technology transfer
• All three subs feature MESMA AIP, boosting endurance to 150 days
• Turkey's STM leads $350 M mid-life upgrade, adding modern sensors and combat system
• Khalid-class launched Babur‑3 cruise missile, boosting Pakistan's second‑strike capability

Pulse Analysis

The 1994 procurement of the Agosta 90B platform marked a turning point for Pakistan’s naval shipbuilding. By embedding a phased technology‑transfer clause, the deal enabled Karachi Shipyard & Engineering Works to acquire hull‑fabrication skills and systems integration experience that later underpinned the 2015 Hangor‑class arrangement with China. This industrial foundation not only reduced reliance on foreign shipyards but also created a domestic talent pool capable of supporting complex submarine projects, a rare asset among South Asian navies.

Technically, the Khalid‑class distinguishes itself through the MESMA air‑independent propulsion system, a closed‑cycle steam turbine that allows the vessels to remain submerged for weeks without snorkeling. Retrofitting MESMA to the first two boats by 2011 gave the entire class a submerged endurance advantage of up to 150 days, far surpassing conventional diesel‑electric submarines. The recent $350 million mid‑life upgrade, spearheaded by Turkey’s STM, replaces legacy French optics with Hensoldt optronic masts, integrates Kelvin Hughes SharpEye radar, and installs Atlas Elektronik’s ISUS‑100 sonar suite, dramatically improving situational awareness in littoral and blue‑water environments.

Strategically, the Khalid‑class has served as the launch platform for the Babur‑3 submarine‑launched cruise missile, extending Pakistan’s second‑strike capability and signaling a credible undersea deterrent. As the Hangor‑class fleet matures, the upgraded Agosta 90B boats will likely transition to littoral patrols, EEZ defense, and training roles, ensuring continuous operational coverage while newer platforms are commissioned. This layered approach mitigates a capability gap, sustains regional power projection, and reinforces Pakistan’s maritime A2/AD posture well into the 2030s.