Fidsplice
5.0 out of 5 starsVerified Purchase
Reviewed in the United States on May 31, 2013
An extremely good product - great value. When you see it you'll realise you would be nuts not to buy it.
This is an exceptional and elegant description of "why", "what you are doing" and "how to get a result" in celestial navigation. So much teaching in this subject is procedural without explanation. This brief card cuts through to the guts of the problem.

I will recommend it without qualification to whoever wants to listen, regardless of the fact that someone scewed up in the production layout so that you can't break off the stub as they suggest. (You'll see what I mean when you buy it, but my recommendation is "Buy it!!")