Solving the Puzzle of Celestial Navigation- Part 2. Meets Requirements for ASA107 Celestial Navigation. Prerequisite Part 1


Learn how to Reduce Sextant Sightings of the Sun, Moon, Planets, and Stars to find your position at sea.  Also learn how to perform dead reckoning plots at sea, how to use DMA Plotting sheets, how to use the Rude Star Finder, what is the difference between Mercator verses Gnomonic Charts, and how to perform Compass Calibration at sea using Celestial Bodies.

Includes every thing required to gain certification to the ASA107 Celestial Navigation Standard.  Includes digital version of “Solving the Puzzle of Celestial Navigation” Part 2 by Captain Michael Brown.  Book is in PDF format and can be read on any computer, I-Pad, or any other device that can read PDF files. 

All questions on the ASA107 Celestial Navigation test are answered in a full and complete manner.  Telephone and email support if needed is included at no additional charge.

Also includes PDFs of the following: Universal Plotting Sheet, ASA107 Celestial Navigation Test, ASA107 Test Instructions, and Work Forms for the Sun, Moon, and Planets, Stars, and Star Finder.  Also included but shipped separately via US mail is the Rude Star Finder and one DMA 925 Plotting sheet.

Students must have already completed Part 1 of the “Solving the Puzzle of Celestial Navigation” Textbook prior to starting Part 2.  Students who have not completed Part 1 will not have the foundation to complete Part 2.  See Bundle of Part 1 and Part 2 of “Solving the Puzzle of Celestial Navigation” if you need both Part 1 and Part 2.

ASA Certification is included at no additional charge.  After completing the ASA107 exam, students return the test answers to us for grading.  Assuming the student gets an 80% or higher, ASA107 Certification will be awarded by our partners and ASA Affiliate Sailing Schools; Delmarva Sailing School or Nockamixon Sailing School.  You can learn more about them by visiting or

“Solving the Puzzle of Celestial Navigation” Part 2.  Table of Contents:

Chapter 1- Arc Intercept Method 7-20
          Reference Material-21
Chapter 2- Sun, Moon, Planet Reduction 22-144
          Work Forms 23-27
Reduction of the Sun 28-64
          Sun Problem-29
          Completing Data Section of Work Form-30
          Determination of GMT Sun 31-32
          Sextant Corrections 33-35
          GHA and LHA Sun 36-37
          How to Determine Assumed Longitude 38-44
          Declination of the Sun 45-47
          Summary of Correction Factors-48
          Sight Reduction using HO229 49-54
          Rounding and Significant Figures-53
          Hci and Hc 54-56
          Zn if South Latitude or North Latitude 57-59
          Difference between Z and Zn-58
          Calculation of Intercept 60-62
          Plotting of LOP Sun 63-64
Reduction of Jupiter 65-102
          Completing Data Section of Work Form-66
          Determination of GMT Jupiter 66-68
          Sextant Corrections 69-73
          GHA and LHA Jupiter 74-84
          How to Determine Assumed Longitude 82-83
          Declination Jupiter 85-87
          Sight Reduction using HO229 88-99
          Plotting Jupiter LOP 100-102
Venus and Mars-103
Moon Reduction-104
          Moon Problem 105-144
          Completing Data Section of Work Form-106
          Determination of GMT 107-108
          Sextant Corrections 109-116
          GHA and LHA Moon 117-124
          How to find Assumed Position 123-124
          Declination of Moon 124-129
          Sight Reduction using HO229 130-139
          Intercept for Moon 140-141
          Plotting Moon LOP 142-144
Chapter 3-Star Reduction-146
          Star Work Form 147-149
          Star Problem 150-192
          Entering Data Section of Work Form-151
          Sextant Corrections 152-155
          Determination of Greenwich Mean Time 156-162
          GHA and LHA Stars 163-174
          Determination of Assumed Position 171-172
          Declination Star 175-177
          Sight Reduction using HO229 178-187
          Intercept 188-189
          Plotting LOP Star 190-192
Chapter 4- DMA Plotting Sheets and Dead Reckoning Plotting 193-201
Chapter 5- Running Fix Plotting 202-208
Chapter 6- Star Finder 2101-D 209-241
          Use of Star Finder 210-216
          Star Finder star problem-217
          Work Form for Star Finder 218-225
          Identification of an unknown star 228-229
          Plotting Planets on Starbase 230-235
          Azimuth and Altitude of Planets 236-241
Chapter 7- Compass Calibration 242-244
Chapter 8- Gnomonic vs Mercator Charts 245-247




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