Astro Navigation Demystified
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  • Stars/Planets
    • The Retrograde and Prograde Motions of Mars and Jupiter
    • Stars For All Seasons Part 1
    • Stars For All Seasons Part 2
    • Stars For All Seasons – Part 3
    • Stars For All Seasons Part 4
    • Stars For All Seasons Part 5
    • Stars For All Seasons – Part 6
    • Stars For All Seasons Part 7. Spring Stars in the Northern Hemisphere.
    • Finding The Stars and Constellations. Part I
    • Finding Stars and Constellations Part II
    • Finding Stars and Constellations – Part III
    • Finding Stars and Constellations – Part IV
    • Planning Star and Planet Sights
    • Predicting the Rising and Setting Times and Positions of Stars.
    • The Southern Cross
    • How To Locate Polaris (Pole Star / North Star)
    • Venus – Evening Star or Morning Star?
    • Latitude From Polaris
  • Moon
    • Phases of The Moon
    • Tidal Effects of the Moon.
    • Measuring the Altitude of the Moon.
    • Survival – Finding Direction From The Moon.
    • Lunar Distance
  • Sun / Earth
    • The First Point of Aries
    • The Ecliptic, The Age of Aquarius and the Tropics.
    • The Sun’s Declination, the Equinoxes and the Solstices
    • The Relationships Between Longitude and Latitude and the Nautical Mile.
    • North/South Movement of the Sun
  • Time.
    • Converting GMT to GHA
    • The Sun as a Time Keeper
    • The Equation of Time
    • Sidereal Time
    • Zone Time
    • Local Hour Angle and Greenwich Hour Angle
    • Time difference between meridians of longitude.
  • Astro Navigation
    • What Is Astro Navigation?
    • What’s The Point Of Astro Navigation When We Have GPS?
    • Why Astro?
    • The Accuracy Of Astronomical / Celestial Navigation
    • Making An Ocean Plotting Sheet
    • Planning Star and Planet Sights
    • In Defence of Mer Pas
    • The Celestial Co-ordinate system.
    • Translating a Celestial Position Into a Geographical Position.
    • The Importance of Altitude and Azimuth in Celestial navigation.
    • Bearing, Azimuth and Azimuth Angle.
    • Astro Navigation in a Nutshell Part 1
    • Astro Navigation In A Nutshell Part Two
    • Astro Navigation In A Nutshell Part 3
    • Astro Navigation In A Nutshell Part Four
    • Understanding Meridian Passage (Mer. Pas.).
    • Applying the Equation of Time when calculating longitude at the Sun’s meridian Passage.
    • Meridian Passage Short Method
    • Meridian Passage Long Method
    • Altitude Correction for Parallax
    • Altitude Correction for Semi-Diameter
    • Altitude Correction for Dip
    • The Astronomical Position Line
    • The Relationship Between Altitude and Zenith Distance
    • Planning Star and Planet Observations
    • Calculating Latitude From The Midday Sun
    • What’s The Point Of Calculating Our Latitude From The Altitude Of The Sun At Midday?
    • Calculating Longitude
    • Accuracy of Sight Reduction Methods.
    • THE IMPORTANCE OF MORNING AND EVENING STAR SIGHTS
    • The Importance of Morning and Evening Stars – Part 2
    • The Importance of Altitude and Azimuth Angle in Position Finding
  • Astro Nav Course
    • Making An Ocean Plotting Sheet
    • The Demystified Astro Navigation Course Unit 1
    • The Demystified Astro Navigation Course Unit 2
    • The Demystified Astro Navigation Course Unit 2 Self Test
    • The Demystified Astro Navigation Course – Unit 3 Part 1
    • The Demystified Astro Navigation Course – Unit 3 Part 2
    • The Demystified Astro Navigation Course – Unit 3 Part 3
    • The Demystified Astro Navigation Course Unit 4
    • The Demystified Astro Navigation Course Unit 5
    • The Demystified Astro Navigation Course – Unit 6
    • Azimuth and Altitude Part 1
    • Azimuth and Altitude Part 2
    • Azimuth and Altitude Part 3
  • Survival Astro
    • Astro Navigation In A Survival Situation
    • Survival – Polynesian Star Compass (Learning from the Polynesians)
    • Survival – Pillars of the Sky (Learning from the Polynesians).
    • Survival – A Plan Of Mathematical Perfection. (Learning from the Polynesians)
    • Survival – Star Compass 1.
    • Survival – The Daytime Star.
    • Survival – Finding Direction From The Moon.
    • Survival – Calculating altitude without an angle measuring instrument.
    • Survival – Latitude From The Midday Sun
    • Survival – Latitude From The North Star
    • Survival – Find Your Longitude.
    • The Survival Sundial.
    • Calculating the Sun’s Declination in a Survival Situation
    • Survival – Make A Clinometer
    • Survival – Declination Table
  • General Interest
    • Astro Navigation in the Forests of the Iroquois
    • Could the Global Positioning System Fail?
    • Titanic and the Traverse Tables
    • Ptolemy’s Geocentric Model
    • The Pharos Lighthouse
    • Eratosthenes Proved The Earth Isn’t Flat
  • Terrestrial Navigation
    • Dead Reckoning
    • Calculating Changes in Longitude and Time Along a Parallel of Latitude.
    • Short Distance Sailing And Rhumb Line Sailing
    • Calculating Distance To The Horizon
  • Schools
    • Making An Ocean Plotting Sheet
    • Why Astro Navigation In Schools?
    • The First Point of Aries
    • The Ecliptic, The Age of Aquarius and the Tropics.
    • Calculating Azimuth And Altitude At The Assumed Position By Spherical Trigonometry.
    • Calculating Distance To The Horizon
    • Pythagoras
    • Spherical Trigonometry
    • Applying Mathematics to Astro Navigation
    • Exercise 1 – Latitude from the North Star
    • Exercise 2 = Application of Spherical Trigonometry
    • Exercise 3 – Short Distance Sailing.
    • Exercise 4 – Local Hour Angle.
    • Exercise 5 – Zone Time (ZT)
    • Exercise 6. Calculating Distance Between Meridians of Longitude Along a Parallel of Latitude.
    • Trig Tables
    • Make A Clinometer
  • Books
    • Astro Navigation Demystified
    • Applying Mathematics to Astro Navigation.
    • Celestial Navigation. Theory and Practice
    • Astronomy For Astro Navigation.
  • Sight Reduction Forms

Sight Reduction Form for Chapters 3 & 4

Sight Reduction Form for use with Chapters 3

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  • Recent Posts

    • Venus Evening Star or Morning Star?
    • The Retrograde and Prograde Motions of Mars and Jupiter
    • Making An Ocean Plotting Sheet
    • The Purpose of Altitude and Azimuth Angle in Position Finding at Sea
    • Planning Star and Planet Sights
    • The Importance of Morning and Evening Star Sights – Part 2
    • The Importance Of Morning And Evening Star Sights
    • Stars For All Seasons Part 7 – Spring Stars in the Northern Hemisphere.
    • Stars For All Seasons Part 6
    • Stars For All Seasons Part 5
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  • Categories

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    • Astro Navigation Demystified
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    • astronomy
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