Most of India’s underwater inspection work still depends on divers — slow, risky, and depth-limited. For the Indian Navy, the deeper problem has been dependence: the remotely operated vehicles (ROVs) that inspect hulls, survey harbours and search the seabed have largely come from foreign suppliers. On 7 October 2026, that dependence cracked. Kochi-based EyeROV delivered two of its TROUT military-grade ROV systems to the Indian Navy — the first such systems designed, developed, manufactured and qualified to military standards in India, according to the company and defence press reports.
The delivery is the first instalment of a five-system order, following a ₹47-crore contract the Navy signed with the startup in September 2025. TROUT reached that contract through the iDEX DISC 7 SPRINT challenge — the Innovations for Defence Excellence programme’s route for strategically important indigenous technology for the armed forces.
A 300-metre workhorse with teeth
The engineering is dense for a vehicle under 40 kg. According to EyeROV’s published specifications, TROUT measures 890 × 510 × 390 mm, is rated for depths of 300 metres, moves in six degrees of freedom on seven thrusters (four vectored horizontally, three vertical), and exceeds 3 knots in still water. The sensor and payload fit is what earns the military-grade label: a 4K primary camera with 10x optical zoom, a full-HD wide-angle secondary camera with a 120° field of view and 90° tilt, four 1,500-lumen LED lights, a dual-frequency multibeam imaging sonar for poor-visibility work, DVL/USBL underwater positioning, an ultrasonic thickness gauge for hull and structure inspection, and a three-degree-of-freedom manipulator arm with a grabber, rope cutter and recovery jaws. It carries up to 4 kg of payload and talks to the surface over a 400-metre neutrally buoyant tether.
Qualified like a weapon system, not a gadget
Before delivery, TROUT went through qualification a commercial inspection ROV never sees: extensive field trials covering manoeuvrability, deep-dive capability, performance in strong underwater currents, detection, navigation, endurance and operator control. It passed the Directorate of Quality Assurance (Naval) framework, met environmental stress screening requirements, and completed type testing — the processes, the company says, that separate a military-grade platform from a commercial vehicle. The Navy’s intended missions cover underwater inspection, surveillance and reconnaissance, search and recovery, detection, and robotic intervention: the hazardous work of hull checks, port and harbour security, underwater infrastructure protection and wreck surveys, done without putting divers in the water.
From DRDO requirements to a Navy contract
EyeROV — formally IROV Technologies Pvt Ltd — was founded in Kochi in 2017 by Johns T. Mathai and Kannappa Palaniappan P., IIT Delhi and IIT Madras alumni who spotted the gap while working on underwater requirements for DRDO. The company says it has since executed more than 150 projects for over 80 clients across power, oil and gas, ports and shipping — Tata Power, NHPC, Adani, ONGC, BPCL and Maersk among them — alongside the Navy, DRDO and the Indian Coast Guard. Its commercial line (the TUNA ROV, the long-range TS-ROV built for dam tunnels and pipelines, and the iBOAT Alpha surface vessel) funds the same engineering that went into TROUT. The startup raised ₹13 crore in a pre-Series A round in February 2026 co-led by AWE Funds and Unicorn India Ventures, and won the National Startup Award in 2022.
Two honest caveats. First, “first military-grade ROV built in India” is the company’s and the defence press’s description — what is independently verifiable is the milestone itself: two Indian-built TROUT systems, qualified through naval trials, now in Navy hands under a ₹47-crore iDEX-backed programme, with three more systems to follow. Second, TROUT is a remotely operated vehicle — tethered and pilot-controlled — not an autonomous one; the delivery puts Indian-built underwater eyes and hands in naval service, not an underwater drone fleet. What makes the story worth featuring is the engineering path: a Kochi deep-tech startup that spent eight years proving its robots on dams, pipelines and offshore rigs, then hardened the platform through military qualification to meet the Navy’s bar — designed, built, tested and delivered in India.
