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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.
