Star Chart with a Companion Booklet of Astronomical Information Bernard's Nautical Star Chart is now produced in two parts; the Chart, which can be supplied folded or rolled up, and a Booklet. The Chart is constructed on Mercator's Principle, showing all Navigating stars from 70 Degrees North and 70 Degrees South declination. Specially adapted for use in conjunction with Brown's Nautical Almanac, selected stars precise location are detailed in the book. The Booklet contains a variety of information including notes on the solar system & star positions, tables of corrections & abbreviations, and notations & symbols used in astronomy.