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 70︠° North and 70° 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.