Foam cladding from France delaying India’s Samudrayaan mission

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A prototype of the MATSYA 6000, a submersible made by Chennai's National Institute of Ocean Technology (NIOT).

A prototype of the MATSYA 6000, a submersible made by Chennai's National Institute of Ocean Technology (NIOT). | Photo Credit: Ravindran R.

A important acceptable of tests connected the Samudrayaan, India’s archetypal manned-submersible dive into the ocean, is apt lone mid-next twelvemonth pursuing a hold successful the procurement of syntactic foam cladding from France.

The Samudrayaan consists of a sphere susceptible of plunging to a extent of 6,000 metres into the ocean. Only a fistful of countries person dived to comparable depths. A unit of 3 volition antheral this submersible, which volition descend to the water floor, scour it, and cod ungraded and stone samples. The ngo is deemed arsenic pivotal to India’s aboriginal exploration plans to excavation precious metals from the precocious seas.

As a prelude to this, scientists from the National Institute of Ocean Technology (NIOT), Chennai, who are starring the project, person built a alloy replica of the submersible that is to beryllium utilized arsenic a simulator for each the tests required anterior to the last mission. Though simulations person been conducted connected this sphere to depths of 100 metres, a last acceptable of trials — that involves sending the submersible down to 500 metres — is connected the anvil. It was primitively scheduled for December 2024.

“Before the 500-metre dive, the (steel) submersible has to beryllium fitted with syntactic foam, which is what gives the submersible buoyancy and allows it to float. This is developed successful France and being tested successful Norway and aft that volition beryllium fitted onto our submersible,” M. Ravichandran, Secretary, Ministry of Earth Sciences, told The Hindu. The Ministry is the genitor assemblage of NIOT. ”Hopefully, it should beryllium delivered by the extremity of the year.”

Once these tests are done, the last titanium hull — that volition beryllium the 1 to marque the last 6,000-metre dive — volition beryllium sent to Russia wherever it volition beryllium tested, successful a laboratory, for its quality to withstand the unit of the water astatine 6,000 metres. “We have, of course, already accounted for this but this trial is required,” helium added. The aforesaid syntactic foam volition beryllium fitted onto the titanium sphere.

The Indian Space Research Organisation is making 2 titanium hulls for NIOT. “Once these tests are done, we anticipation to behaviour the 500-metre dive by April adjacent year,” Mr. Ravichandran added. He was speaking connected the sidelines of a property league to denote the India International Science Festival (IISF), an yearly lawsuit organised by India’s subject ministries to amended the younker astir subject and animate them to instrumentality up subject arsenic a career.

The IISF volition beryllium held from December 6-9 astatine Panchkula, Haryana, and volition beryllium inaugurated by Science Minister Jitendra Singh.

Published - November 28, 2025 09:13 p.m. IST

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