Big, Bigger, Biggest

Submarine (2x2)

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This second instalment of the show that explores major leaps in engineering reveals how six technological breakthroughs enabled the construction of gigantic submarine, the USS Pennsylvania. First commissioned in 1989, the USS Pennsylvania is the biggest submarine in the western world. However, the construction of this mammoth underwater warship would not have been possible without six key innovations... This programme examines all six, and details how the monster submarine developed.