I've seen several of these over the years, called "map mileage calculator" or "analog map distance reader" or various combinations of words meaning all the same thing. Doing a google search, I noted one here:
http://www.kitefarm.com/compass_museum/unclassd.htm
__________________
"There are three reasons to own a gun: To protect yourself and your family, to hunt dangerous and delicious animals, and to keep the King of England out of your face." รข?? Krusty the Clown
|