Question:medium

Which country’s Navy department has signed first reliable communication link with the Indian Navy and Pacific Naval Commands under the COMCASA pact?

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COMCASA is one of the foundational defense agreements between India and the US, enabling encrypted communications between their militaries.
Updated On: Jul 15, 2026
  • Sri Lanka
  • Japan
  • Russia
  • US
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The Correct Option is D

Approach Solution - 1

This question is about identifying the country behind the COMCASA agreement with India. Sri Lanka, Japan and Russia all maintain defence relationships with India in some form, but COMCASA specifically is not an agreement India has with any of these three, so they can be dismissed together.

COMCASA, short for Communications Compatibility and Security Agreement, is a pact between India and the United States that let the two navies set up their first secure, real time communication link, improving coordination during joint exercises and operations.

So the correct answer is US.

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Approach Solution -2

Communications Compatibility and Security Agreement, or COMCASA, is one of the three foundational defense pacts India signed with a key partner nation to enable the exchange of encrypted and secure military communications equipment. Knowing what the agreement covers helps identify which country it belongs to.

  1. Sri Lanka: is a close maritime neighbor of India, and both navies coordinate on issues like fishing disputes and anti-smuggling patrols, but no foundational communications agreement of this kind exists between the two countries.
  2. Japan: Naval cooperation with Japan has grown through joint exercises and a mutual logistics support arrangement, though nothing under the COMCASA name has been signed between India and Japan specifically.
  3. Russia: supplies India with a large share of its military hardware and even leases nuclear submarines to the Indian Navy, but the communications architecture it uses with India is built around its own legacy systems, not the COMCASA standard.
  4. US: is the actual counterparty to COMCASA, and once the pact was signed, the US Navy used it to link up with the Indian Navy and the Pacific Naval Commands for secure communication, a step that also paved the way for closer coordination in exercises like Malabar.

Reviewing the actual scope of the COMCASA agreement makes it clear that the US is the country involved.

Therefore, the correct answer is US.

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