Deep Ocean Mission, Samudrayaan & Submersibles
The Deep Ocean Mission (DOM), approved by the Government of India as a flagship multi-institutional initiative under the Ministry of Earth Sciences (MoES), seeks to develop deep-sea technologies for sustainable ocean exploration. Central to this mission is Project Samudrayaan, spearheaded by the National Institute of Ocean Technology (NIOT), Chennai. It involves the engineering of 'MATSYA 6000', an indigenous human-occupied submersible capable of transporting a crew of three to ocean depths of 6,000 metres under extreme atmospheric pressures. Primary mission objectives encompass surveying polymetallic nodules rich in nickel, cobalt, copper, and manganese in the Central Indian Ocean Basin, prospecting deep-sea polymetallic sulphides along hydrothermal vents, and researching novel marine bio-resources for biotechnology.
Key Concepts & Examination Highlights
- MATSYA 6000 is India's indigenous crewed submersible designed to carry 3 human personnel to a depth of 6,000 metres.
- The National Institute of Ocean Technology (NIOT), Chennai, is the lead nodal agency developing the Samudrayaan submersible.
- India holds exploration rights for Polymetallic Nodules allocated by the International Seabed Authority (ISA) in the Central Indian Ocean Basin (CIOB).
- The Deep Ocean Mission comprises six major thematic pillars including ocean climate change advisory services and deep-sea mining vehicles.
- The Union Cabinet approved the Deep Ocean Mission (DOM) in June 2021 with an estimated multi-year budget outlay of over ₹4,077 crore under the Ministry of Earth Sciences.
- MATSYA 6000 is engineered with a titanium alloy personnel sphere designed to withstand intense hydrostatic pressures of up to 600 bar at deep sea floor depths.
- India was designated as the first 'Pioneer Investor' in deep-sea polymetallic nodule exploration by the UN International Seabed Authority in 1987.
- Polymetallic nodules (manganese nodules) on the abyssal plain contain commercially valuable strategic metals including manganese, nickel, copper, and cobalt.
- NIOT has also developed unmanned underwater robotic exploration systems, including deep-water Remotely Operated Vehicles (ROVs) and Autonomous Underwater Vehicles (AUVs).
- India has acquired exploration rights from the ISA for Polymetallic Sulphides (PMS) along the Rodriguez Triple Junction in the Central and Southwest Indian Ridges.
- The Samudrayaan mission positions India alongside an elite group of nations with crewed deep-submergence capabilities, including the United States, Russia, France, Japan, and China.
- Ocean Thermal Energy Conversion (OTEC) research under the mission explores harnessing temperature differentials between warm surface ocean water and deep cold ocean water for electricity and desalination.
- The Deep Ocean Mission (DOM) was approved by the Union Cabinet in 2021 as a flagship mission of the Ministry of Earth Sciences (MoES) to explore deep-sea resources and develop marine technologies.
- Samudrayaan is India's first manned ocean mission under DOM, designed to send a crew of three humans to a depth of 6,000 meters in the ocean.
- MATSYA 6000 is the human-crewed submersible vehicle developed by the National Institute of Ocean Technology (NIOT), Chennai, featuring a titanium alloy pressure hull of 2.1 m diameter.
- Polymetallic nodules (manganese nodules) on the abyssal seafloor contain strategic metals such as nickel, cobalt, copper, and manganese.
- India was the first country to be granted the status of 'Pioneer Investor' in 1987 by the International Seabed Authority (ISA) for deep seabed polymetallic nodule exploration.
- India has been allocated a 75,000 km² exploration area in the Central Indian Ocean Basin (CIOB) by the International Seabed Authority.
- Hydrothermal vents ('black smokers') along mid-ocean ridges release mineral-rich superheated fluids, forming massive polymetallic sulfide deposits containing gold, silver, and copper.
- Gas hydrates are crystalline ice-like solids composed of water molecules trapping methane gas under high pressure and low temperature conditions along continental margins.
- The National Institute of Oceanography (NIO) in Goa and National Centre for Polar and Ocean Research (NCPOR) in Vasco da Gama lead oceanographic and polar research in India.
- Autonomous Underwater Vehicles (AUVs) and Remotely Operated Vehicles (ROVs), like NIOT's ROSUB 6000, conduct unmanned bathymetric mapping and sample retrieval.
- Ocean Thermal Energy Conversion (OTEC) exploits the temperature differential between warm surface ocean waters and cold deep waters to generate renewable electricity.
- NIOT developed a low-temperature thermal desalination (LTTD) plant in Kavaratti, Lakshadweep, providing potable drinking water from ocean thermal gradients.
- Deep-sea marine bioprospecting aims to identify unique extremophile enzymes, bioactive compounds, and microbial adaptations for pharmaceutical and industrial applications.
- The Deep Ocean Mission (DOM) was approved by the Union Cabinet of India in June 2021 with a budgetary outlay of Rs 4,077 crore over five years.
- The Ministry of Earth Sciences (MoES) is the nodal ministry spearheading the multi-institutional implementation of the Deep Ocean Mission.
- The National Institute of Ocean Technology (NIOT), Chennai, is the premier autonomous institute leading the engineering and deep-sea technology development under DOM.
- Samudrayaan is India's flagship manned deep-ocean submersible mission designed to carry three humans to a depth of 6,000 meters in the ocean.
- MATSYA 6000 is the indigenous human-occupied submersible vehicle developed by NIOT under the Samudrayaan initiative.
- MATSYA 6000 features a 2.1-meter-diameter spherical titanium alloy personnel capsule designed to withstand hydrostatic pressure of 600 atmospheres at 6,000 meters depth.
- MATSYA 6000 is equipped with autonomous operational endurance of 12 hours under normal conditions and up to 96 hours in critical emergencies.
- With the operationalization of Samudrayaan, India joins an elite group of nations possessing manned deep-submersible capability: USA (Alvin), Russia (Mir/Konsul), France (Nautile), Japan (Shinkai 6500), and China (Fendouzhe/Jiaolong).
- The International Seabed Authority (ISA), headquartered in Kingston, Jamaica, was established under UNCLOS to regulate all mineral-related activities in the international seabed Area.
- India was designated as a 'Pioneer Investor' in 1987 by the United Nations, becoming the first country to receive exploration rights in the Central Indian Ocean Basin (CIOB).
- India holds an exclusive exploration contract with the International Seabed Authority over a 75,000 square kilometer area in the Central Indian Ocean Basin for Polymetallic Nodules (PMN).
- Polymetallic Nodules (PMN), also called manganese nodules, are potato-sized rock concretions lying on the abyssal seafloor between 4,000 and 6,000 meters depth.
- Polymetallic nodules are economically valuable because they contain high concentrations of Manganese (24-30%), Nickel (1.4%), Copper (1.3%), and Cobalt (0.25%).
- The estimated mineral resource in India's allocated CIOB exploration area is approximately 380 million tonnes of nodules containing 4.7 million tonnes of nickel, 4.29 million tonnes of copper, and 0.55 million tonnes of cobalt.
- The International Seabed Authority also granted India exploration rights over 10,000 square kilometers in the Central Indian Ridge and Southwest Indian Ridge for Polymetallic Hydrothermal Sulphides (PMS).
- Hydrothermal sulphides are mineral deposits rich in copper, zinc, gold, and silver formed around seafloor hydrothermal vents ('black smokers').
- Cobalt-rich ferromanganese crusts precipitate on the flanks and summits of undersea seamounts, containing high concentrations of cobalt, tellurium, and rare earth elements.
- Gas hydrates are crystalline, ice-like solids composed of natural gas (primarily methane) trapped inside hydrogen-bonded water molecule cages (clathrates).
- Gas hydrates occur under conditions of high hydrostatic pressure and low temperature in deep marine continental shelf sediments and polar permafrost.
- One cubic meter of methane gas hydrate can dissociate to yield approximately 164 cubic meters of natural methane gas at standard temperature and pressure.
- The National Gas Hydrate Program (NGHP) of India, coordinated by the Directorate General of Hydrocarbons (DGH), discovered extensive gas hydrate reservoirs in the Krishna-Godavari, Mahanadi, and Andaman basins.
- Ocean Thermal Energy Conversion (OTEC) is a renewable marine energy technology that exploits the temperature gradient between warm surface seawater (approx 25 deg C) and cold deep seawater (approx 5 deg C).
- NIOT successfully established the world's first low-temperature thermal desalination (LTTD) plant at Kavaratti in the Lakshadweep Islands in 2005 to generate freshwater from seawater.
- Low-Temperature Thermal Desalination (LTTD) utilizes the natural temperature gradient between warm surface seawater and cold deep-sea water to flash-evaporate water at low pressure.
- Autonomous Underwater Vehicles (AUVs) and Remotely Operated Vehicles (ROVs) are deployed by NIOT for high-resolution bathymetric mapping and seabed photography.
Sample Solved Questions & Concept Explanations
8 Verified Concept QuestionsWhat is the name of India's indigenous human-occupied deep submersible vehicle developed under the Samudrayaan project to carry a 3-person crew to a depth of 6,000 metres?
Which autonomous oceanographic engineering institute located in Chennai, Tamil Nadu, functions as the lead agency engineering the Samudrayaan manned submersible?
In deep ocean basins, 'polymetallic nodules' (manganese nodules) are considered strategic mineral resources primarily because they contain high concentrations of which critical transition metals in addition to manganese and iron?
Under the multi-disciplinary Deep Ocean Mission approved by the Union Cabinet, which Union Ministry serves as the nodal implementing ministry?
What high-strength metallic alloy material is utilized to fabricate the 2.1-metre internal diameter spherical personnel hull of MATSYA 6000 to endure 600 bar hydrostatic pressure?
Which ice-class oceanographic research vessel operated by the National Institute of Ocean Technology (NIOT) serves as the primary mother-ship for testing deep-sea mining tools and submersibles?
What is the primary operational objective of the Autonomous Underwater Vehicle (AUV) named 'Neerakshi' developed collaboratively by GRSE and CSIR-CMERI?
The National Centre for Polar and Ocean Research (NCPOR), India's apex autonomous institution coordinating Antarctic, Arctic, and Southern Ocean expeditions, is located in which state?