Books
Google+

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
Archives
 April 2020
 September 2019
 June 2019
 May 2019
 March 2019
 February 2019
 January 2019
 December 2018
 November 2018
 October 2018
 September 2018
 August 2018
 July 2018
 June 2018
 March 2018
 January 2018
 November 2017
 October 2017
 September 2017
 August 2017
 July 2017
 May 2017
 April 2017
 March 2017
 February 2017
 December 2016
 November 2016
 September 2016
 August 2016
 July 2016
 June 2016
 April 2016
 March 2016
 February 2016
 January 2016
 December 2015
 November 2015
 October 2015
 September 2015
 August 2015
 July 2015
 June 2015
 May 2015
 April 2015
 December 2014
 November 2014
 October 2014
 August 2014
 June 2014
 April 2014
 February 2014
 November 2013
 September 2013
 August 2013
 July 2013
 May 2013
 April 2013
 September 2012
 August 2012
 January 2012
 January 2011
Categories
 astro navigation
 Astro Navigation Demystified
 Astro Navigation Topics
 astronomy
 celestial navigation
 celestial sphere
 coronal mass ejections
 earth science
 electronic navigation systems
 Equation of time
 geography
 geometry
 global positioning system
 gps
 Marine Navigation
 mathematics
 Meridian Passage
 navigation
 Polynesian Navigators
 Schools
 spherical trigonometry
 Survival
 Topics For Schools
 trigonometry
 Uncategorized
Meta
russfeed
 Follow Astro Navigation Demystified on WordPress.com
Blog Stats
 1,049,203 hits
Tag Archives: celestial
Rising and Setting Times of Stars.
It is very useful to be able to calculate the times at which the principal stars and constellations will rise in the east. It is also helpful to be able to predict the approximate position of the star or constellation … Continue reading →
The Relationship Between Longitude, Latitude and the Nautical Mile.
The Relationship Between Longitude and the Nautical Mile. The Earth’s equatorial circumference is 21640.6 n.m. Since the Equator is a great circle, 1o will subtend an arc of: 21640.6 ÷ 360 = 60.113 ≈ 60 n.m. There are 360 meridians of Longitude so … Continue reading →
Calculating the Sun’s Declination in a Survival Situation
In an ideal situation, we could find our latitude by using a satellite navigation system. If satnav is not available, we can use astro navigation to calculate our latitude by the method shown at the following links: Latitude from the … Continue reading →
Posted in astro navigation, Survival

Tagged amazon, astro navigation, astronomy, book, celestial, celestial navigation, celestial navigation for dummies, celestial navigation made easy, celestial navigation training, eBook, mathematics of celestial navigation, navigation, survival, survival  navigation

Leave a comment
Planning Star and Planet Observations
I have been asked about using ABC tables to calculate azimuth and altitude when planning star and planet observations. Unlike the Sun and the Moon which are easily identified, the approximate positions of stars and planets need to be established … Continue reading →
Posted in astro navigation

Tagged amazon, astro navigation, book, celestial, celestial navigation, celestial navigation for dummies, celestial navigation made easy, celestial navigation training, eBook, mathematics of celestial navigation, Planning star and planet observations, Rapid Sight Reduction, star and planet observations

Leave a comment
Astro Navigation In A Survival Situation
In a recent survey, the majority of people questioned were surprised to learn that astro navigation can be used in a survival situation. In the same survey, 60% said that they would use satellite navigation systems to find their way … Continue reading →
Posted in Astro Navigation Topics, Survival

Tagged amazon, astro navigation, book, celestial, celestial navigation, celestial navigation for dummies, celestial navigation made easy, celestial navigation training, eBook, mathematics of celestial navigation, survival, survival  astro navigation, survival  navigation

8 Comments
Finding Latititude In A Survival Situation.
The full method of calculating your latitude from the altitude of the Sun can be found at this link. However, in a survival situation, the following simplified method can be used. Equipment Needed. A clinometer or other device for measuring angles. … Continue reading →
Posted in Astro Navigation Topics, navigation, Survival

Tagged amazon, astro navigation, book, celestial, celestial navigation, celestial navigation for dummies, celestial navigation made easy, celestial navigation training, eBook, mathematics of celestial navigation, survival, survival  astro navigation, survival  navigation

7 Comments
Astro Navigation – What is it and why do we need it?
Astronavigation (or celestial navigation as it is also known) is a fascinating subject that encompasses many areas of knowledge including geography, astronomy, history and mathematics. As you unravel the principles and techniques upon which navigation is based, you will be … Continue reading →
Posted in Astro Navigation Topics, Schools

Tagged amazon, astro navigation, book, celestial, celestial navigation, celestial navigation for dummies, celestial navigation made easy, celestial navigation training, eBook, global positioning system, GPS failure, mathematics of astro navigation, mathematics of celestial navigation, navigation

1 Comment
Finding Longitude In A Survival Situation.
We know that the Earth revolves about its axis once every 24 hours. In other words, the Sun completes its apparent revolution of 360o in 24 hours. This means that the Sun crosses each of the 360 meridians of longitude once … Continue reading →
Posted in Astro Navigation Topics, Survival

Tagged amazon, astro navigation, book, celestial, celestial navigation, celestial navigation for dummies, celestial navigation made easy, celestial navigation training, eBook, mathematics of celestial navigation, survival, survival  astro navigation, survival  navigation

4 Comments
Latitude from Polaris
Using The Pole Star (Polaris) To Find Your Latitude Assume that the Pole Star (Polaris)is exactly in line with the Earth’s axis produced, as shown in the following diagram. To an observer O on the Equator (lat. 0o) the Pole … Continue reading →
Posted in Astro Navigation Topics, navigation, Schools, Survival

Tagged amazon, astro navigation, book, celestial, celestial navigation, celestial navigation for dummies, celestial navigation made easy, celestial navigation training, eBook, mathematics of celestial navigation, navigation, survival, survival  astro navigation, survival  navigation

4 Comments
Spherical Trigonometry Introduction
In the diagram above, the inner circle represents the Earth and the outer circle represents the celestial sphere. Point N represents the North Pole, B represents an observer’s position on the surface of the Earth, and U represents the geographical … Continue reading →
Posted in Astro Navigation Topics, Schools

Tagged amazon, astro navigation, astronomy, book, celestial, celestial navigation, celestial navigation for dummies

1 Comment
You must be logged in to post a comment.