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Southern Front · Indian Ocean Region

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Hormuz route-and-fee regime hardening on the western flank; Pakistan's new Chinese-built submarine reportedly headed for the Bay of Bengal on the eastern one; island-base buildout accelerating in between.

India's southern maritime front is under pressure from both ends of the Indian Ocean. To the west, the Strait of Hormuz crisis has cost India three attacked merchant vessels since March and forced a standing naval escort operation for Indian-flagged shipping, and Iran's 2 July move to dictate transit routes and float 'service fees' threatens to make that disruption structural. To the east and south, China's footprint keeps thickening — dual-use survey ships mapping the seabed from the Bay of Bengal to the Arabian Sea and the first Chinese-built Hangor-class submarine delivered to Pakistan, with reports of a Bay of Bengal foray planned. India is answering with island infrastructure (a Rs 13,000-crore naval-controlled airport cleared for Great Nicobar in June), fresh ASW and survey hulls commissioned at Kolkata on 21 June, and platform deployments in the Maldives under the 2024 maritime-security partnership.

Updated 5 Jul 2026 · updates logged below as they happen

Changelog

What's happened

  1. Iran's joint military command orders all oil tankers through the Strait of Hormuz onto its approved routes on pain of a 'forceful response', with officials insisting 'service fees' will be charged — converting wartime leverage into de facto control of India's most important energy chokepoint.

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  2. Indian outlets report Pakistan plans to send its newly inducted Chinese-built Hangor-class submarine into the Bay of Bengal — the first such foray since the 1971 war — with the Indian Navy reported on alert.

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  3. PM Modi commissions three GRSE-built warships at Kolkata — stealth frigate INS Dunagiri, survey vessel INS Sanshodhak and ASW shallow-water craft INS Agray — adding anti-submarine and hydrographic capability for Indian Ocean domain awareness as China's presence expands.

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  4. The Maldives' new Guardian-class patrol boat, gifted by Australia under the Pacific Maritime Security Programme, arrives at Hulhumalé harbour ahead of a planned July commissioning — a reminder that Malé is diversifying its maritime-security partners beyond India.

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  5. The first Hangor-class submarine — lead boat of eight Chinese-built AIP submarines for Pakistan and Beijing's most significant naval export — arrives at Karachi Port, extending China's military footprint in the Indian Ocean.

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  6. Centre clears a Rs 13,000-crore greenfield civil-military airport for Great Nicobar at Chingen near Galathea Bay, to be built in five years under naval operational control instead of expanding INS Baaz — anchoring India's watch over the Malacca Strait approaches.

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  7. Vice Admiral Vineet McCarty takes over as the 20th Commander-in-Chief of the tri-service Andaman and Nicobar Command, India's forward headquarters astride the Malacca approaches.

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  8. Chinese research vessel Shi Yan 6 is reported to have completed a survey near the Ninety East Ridge before porting at Malé, with India's MoD and the Navy's IMAC tracking its movements — part of a wider dual-use seabed-mapping pattern across the IOR.

    source ↗

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