Conceived as a secret weapon against German submarines, Project Habakkuk aimed to create a massive aircraft carrier made of pykrete—an ice and wood pulp mixture with remarkable strength.

Megaprojects. Project Habakkuk: Churchill’s Frozen Supercarrier. Posted: May 9, 2025 | Last updated: May 9, 2025. In 1942, the British faced severe naval losses to German U-boats in the Atlantic.