NavList:

Thanks Gary, Very interesting about the aircraft useing mag headings.  I suppose these days it like a fluxgate ( eletronic mag compass).  I guess that makes sense due to the runways being orientated along mag headings?

I am a very big fan of the Astro compass as well as others such as the Abrams.  The Astro is so simple to use and can even give the ueser a decent fix if info on the sun or planet are known. ( by reverse engineering the work sheet), as I'm sure all know that use or have used one.  Actually I think even today it's a fine tool for navigation, and often used ( at least by me) for mag compass correction, deviation card etc.