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For countless centuries, the sea has enticed mankind to travel and explore always at risk of disaster from the ocean's tumultuous power and basic inhospitability to human life. Segments cover two famous shipwrecks and a phenomenon that endangers deep-sea divers.
- TITANIC DISASTER: Studies the forces at work during the final moments of the fateful transatlantic journey of the Titanic.
- THE WRECK OF THE PORTLAND: Explores the ocean floor with scientists attempting to unlock the secrets of a passenger steamer that sank one stormy night in 1898.
- SCUBA DIVING DANGERS: Reveals how changes in water pressure affect the behavior of gases and become harmful to deep-sea divers.