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Documentary focuses on cruise-ship engineering

Those who aren't burned out on coverage of the centennial of the Titanic’s sinking might want to tune in to PBS tonight for the premiere of "Nova: Why Ships Sink."

The documentary focuses on cruise ship engineering, noting that the average cruise ship has doubled in size in just the last 10 years.

Some engineers interviewed fear that these towering behemoths are dangerously unstable. The recent tragedy involving the Costa Concordia has raised new questions about their safety.

Marine engineering and safety experts will reconstruct the events that led to famous cruise disasters, including the ill-fated Concordia, the Sea Diamond and the Oceanos.

Click here for a video promotion of the show, which will be shown at 9 p.m. Check listings for your local PBS station.

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