Hovercrafts, also known as Air Cushion Vehicles (ACVs) which ride on a layer of air trapped below it and can traverse over multiple types of terrains such as sand, marshes, marine, mud, ice, pavements etc. on a single journey without needing any modifications to the vessel. They have a distinct operational advantage over other marine vehicles whereas they can operate without the presence of dedicated facilities such as harbours, docks or a jetty. Their versatility makes them ideal for a wide range of applications, from military and rescue operations to commercial transportation and recreational activities. Hovercraft design is a specialized domain and the same is not available in India. All the major equipment and machineries for these hovercrafts are foreign make and accordingly maintenance support is also dependent on foreign OEMS. Ancillary industries to support maintenance or production of hovercrafts has not grown in our country. Since these hovercrafts are based on foreign design and equipment fit, it will have fait-accompli reliance on foreign OEM for maintenance support as well. Globally, a few foreign players were well entrenched creating an "Economic Moat" making it difficult for new players to complete / sustain in the market. Depending on foreign manufacturer for design/ technology will further restrict ability to meet the diverse operational requirements of the Indian defence forces GRSE in collaboration with domestic partner would like to develop a prototype with high indigenous content as a part of “Atmanirbhar Bharat” initiative, for more Military centric applications, to cater for the Indian Coast Guard and Indian Army requirements, which would enable GRSE to provide product lifecycle support to the customer without dependency on foreign OEMs Primary Mission of the Product: The product shall be able to perform multipurpose maritime operation as follows: - (a) High & Low speed amphibious coastal patrol in shallow waters, marshy (b) areas and deep sea with higher operational envelope. (c) Interception and interdiction of offending vessels by both day and night. (d) Search and Rescue operations. (e) Rendering assistance to ships and ACV in distress. (f) To meet logistics requirements w.r.t. cargo carrying and troops carrier. (g) Relief operations, carrying troops, cargo and pollution control equipment are also the roles envisaged for HDACVs. Principal Requirement: • Length: Not less than 28 mtrs • Beam: not less than 10mtrs • Displacement: As per design to suit range, endurance, loading and speed requirements • Max Speed: Not less than 45 knots with maximum AUW • Cruising Speed: Not less than 35 knots • Endurance: Not less than 12 hrs with expendable fuel at cruising speed • Range: Not less than 420 Nm at cruising speed. • Payload: Minimum payload of 20 tonnes which may include vehicle like Troops carrier, Gemini Boats, ATV or Container or Pollution Response equipment & personnel • Hull: Marine grade material composition like Al/ GRP/Composite • Sea worthiness: Operations upto sea state 4 with significant wave height of 2 mtrs and shall have survivability up to sea state 5. • Obstacle Clearance: Shall be able to clear obstacles of minimum 1.0 mtrs in height without any damage to its hull and fittings • Propulsion: Diesel Propulsion with Min two Main Engine and suitable electro-hydraulic CPP and steering system. • Bow Thruster: Bow thrusters or equivalent arrangement to assist in controlling bow. • Lift fan system • Skirt System: open or close loop skirt or both • Service Life: Not less than 20 years with annual exploitation upto 500 hrs. • Suitable Navigation & Communication Equipment package • Power generator: Suitable quantity of Main Engine driven alternators to provide power to all critical electrical equipment and Two independent Power Generation units of adequate capacity with separate starting batteries • Solar power generation system • Suitable sized ramp with minimum 3.5 mtrs width to be provided to facilitate embarkation/ disembarkation of wheeled or tracked Vehicles/ Gemini Boats, Cargo/ Containers/ PR equipment. • The achievable Indigenous Content of the product shall be minimum 50%. Class Notation: The prototype is to be design & built to LRS class notation “+100 A1 SSC Patrol ACV HSC LDC Group 3 MCH‟ (Service extends to 200 Nm for refuge)” or equivalent of IRS/ABS/DNV/BV.