The publication is the publication of the outstanding monument of medieval Arab science "Books of Polish on the foundations and rules of marine science," owned by the famous Arab navigator Ahmad ibn Majid, the pilot who brought the ships of Vasco da Gama to India. The famous Soviet Arabist, specialist in the history of Arab navigation T. A. Shumovsky investigated and translated the ztot monument, which he called the "Arab Maritime Encyclopedia of the 15th Century.." The publication contains a Russian translation of the monument, research, commentary and Russian signs, as well as critical text and pointers to it.