Ключевые слова: activity, adventure, aqualung, aquatic, blue, boy, certification, children, course, deep, dive, diver, diving, equipment, extreme, fun, hobby, image, instruction, instructor, learn, learning, lesson, life, man, mask, ocean, oxygen, person, pool, sea, snorkel, snorkeling, sport, student, suit, summer, swim, swimming, tank, teaching, training, travel, tropical, undersea, underwater, vacation, water, woman,