Karlsen has done extensive researching on the Viking 'sunstone' and 'horizon board' and explains how they work

which stars are reddish

Chart Image Size: 41" x 35"

Chart Image Size: 41¼" x 33½"

ATL111 are downloaded from the CHS with corrections and minor tweaks  printed by ProStar Publications

NGA Chart 26146: Cap-Haitien Mobile Bay to Apalachicola Bay Karlsen has done extensive researchingScale: 1: 10,000 Captain's Supplies is a Print on Demand nautical chart dealer for NGA Charts. Charts are printed on high quality heavy paper with waterproof ink. Other options available. NGA charts are printed using the most recent data provided by the National Geospatial Intelligence Agency (NGA). Much of this data may no longer be current. Boaters are advised to consult the "Corrected through NM ## ##" note in the margin of the chart for additional