Ключевые слова: 26th january, ammunition, battle, bengali language, boat, coastline, defense, diesel, display, engine, harbor, history, immersion, india, indian, indian armed force, indian army, indian naval force, indian navy, indian navy force, kolkata, marine, metal, military, model submarine, naval, naval force, navy, ocean, republic day parade, sea, service, ship, silent, steel, strong, submarine, submrine, swift, technology, torpedo, tourism, transport, travel, war, warship, water, weapon, west bengal,