Ключевые слова: aquatic, blue waters, dark depths, deep sea, defense, engineering, exploration, isolation, marine, marine technology, maritime, military, mission, nautical, naval, navigation, navy, ocean, oceanic, oceanography, operation, patrol, powerful, sea exploration, sea vessel, security, silent, stealth, strategic, submarine, submerged, submersible, sun rays, tactical, technology, underwater, vessel, watercraft,