Project Habakkuk tests the 'crackpot' label

When a viewer lists wartime schemes that look absurd, appearance alone does not settle whether they were crackpot ideas. The enormous ice-carrier proposal, Project Habakkuk, had a clear internal logic, and its sheer mass would have made it exceptionally difficult to destroy. The response also distinguishes useful applications from poor ones: German remote-controlled demolition vehicles could help lay mines, while driving explosives into defended positions was less successful. The surrounding examples, from acoustic aircraft detectors to giant gliders and submarine-launched observation platforms, show why experimental weapons have to be judged by purpose and results.