The Astro-Navigational almanac (Астронавигационный альманах, in Russian) is a guide to solving problems of marine celestial navigation using programmable microcalculators Elektronika B3-34, Elektronika MK-52, -54, -56, -61 (Электроника Б3 & МК, in Russian), compatible in programming language and microcomputer.

Yes, of course, it’s very old. But the theoretical material described at the beginning of the almanac is a must have. And I needed some of this in one of my projects. I had this almanac somewhere at home, but after searching everything, I didn’t find anything. Searches on the web also turned out to be in vain, maybe I just didn’t search well, it doesn’t matter. All that was left was to go to the library. But unfortunately, COVID-19 began and all libraries were closed for quarantine, as a result of which the plans were disrupted and work in this direction stopped for a couple of months 🙁. Finally, when the libraries opened, I found this book in the Central Naval Library (Центральная военно-морская библиотека, in Russian), for which many thanks to them.

I only needed theoretical material, so I only photographed it (page 5-120). I decided to put it in the public domain, maybe someday someone will also need this almanac.

Bibliography:

[1] Астронавигационный альманах на 1986-1990 гг. 19009 Л.: ГУНиО МО, 1987. 224 с.