Ship of Ice (2005, The Sea Hunters, Documentary)

Real-life adventures into the depths of World War II. Join bestselling action-adventure author Clive Cussler, renowned maritime archaeologist James Delgado, and their crack team of divers to explore some of the most significant shipwrecks of World War II.

Crackpot idea, or work of genius? To protect Allied convoys during World War II, eccentric scientist Geoffrey Pyke proposed a manmade island of ice as a floating airbase. Now, in the thin atmosphere of the Canadian Rockies, the Sea Hunters dive a mountain lake to find the ice island’s prototype.

Alex4History's supplementary notes:
From "The Sea Hunters: Relics of WWII" documentary series.

https://en.wikipedia.org/wiki/Geoffrey_Pyke

https://en.wikipedia.org/wiki/Project_Habakkuk

https://en.wikipedia.org/wiki/Pykrete

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