Ice boat conversion - GIF

[Frank S]

There was a guy that invented a material made of sawdust and water frozen together. I forgot what he called it. It would stay frozen for a long time, and he envisioned aircraft carriers (I think) or some other kind of ships made from it. It was considered to be used but for whatever reason it never was.

His name was Geoffery Pyke his invention was Pykrete wood pulp and water this was not his only invention, another was a snow vehicle for troop transport
https://www.legendsliveon.co.uk/articles/m29-weasel
https://en.wikipedia.org/wiki/Geoffrey_Pyke
https://en.wikipedia.org/wiki/Project_Habakkuk

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