Quote:
Originally Posted by ybar
![](https://www.subsim.com/radioroom/<a href="https://public.joomeo.com/files/626ba4ca6a2ea">Calculator_HR2.jpg</a>) Recently while reading a book on the Second World War, I was surprised to discover a celestial navigation tool that was on board the Uboote!
Do you have more information about this device?
Calculator_HR2.jpg |
It looks very similar to the
Bygrave or
Fuller cylindrical slide rules. I'm sure someone at
NavList would know more about it.