Rational Horizons and Positioning in Celestial Navigation
This free online course on visible, sensible and rational horizons, as well as the steps for calculating position lines.Publisher: ADU
CertificationView course modules
Rational horizons and positioning in celestial navigation is a free online course that has been specifically developed to teach about visible, sensible and rational horizons. This course will improve your understanding of sextant altitude, sensible horizon, and the horizon system of coordinates. The course will expose you to very important concepts in celestial navigation. You will learn about the angle that can be obtained after correcting the index error and the concept of the parallax. Do you know there is a relationship between time and longitude? Do you also know about the relationship between time and hour angle? When you complete this course, you will be able to explain how the LMT can be measured westerly from the inferior meridian of the observer. Prepare yourself to learn about position fixing of a ship when the ship is out of sight of land and time of meridian altitude of the sun. There is also a method called the Ex-Meridian of the sun which you will learn about in this course.
Completing this course will help you learn how to calculate and deduce calculated longitudes and Intercepts. You will also learn about intercept methods of sight calculation. Here, you will also learn how to deduce the true azimuth of a body and use it to obtain the compass error. In navigation, it is important to learn about the method of simultaneous and staggered observations. This course can also help you derive the direction of the position lines by means of observations of the sun. You will also be able to learn how to derive and calculate the direction of the position lines by means of observations of the planet. To learn about these position lines calculations, you will need to understand how to find the approximate GMT mer pass. It is also necessary to learn how to obtain the declination for the time of mer pass. You will also learn how to calculate the obs lat and state direction of LOP.
Furthermore, this course will help you get familiar with the longitude by chronometer and intercept methods of sight calculation. You will learn about the intercept or Marc St Hilaire method and procedure for solving longitude by chronometer problem. This course will teach you the method that can be used to find the latitude of the observer when the heavenly body is near the observer’s meridian. This course will also help you get familiar with the fundamental part of navigation. Do you know that the visible Sunrise and Sunset can be illustrated? The Procedure for calculating compass error by amplitude measurement will also be covered in this course. Completing this course will teach you about the relationship between the GHA of the sun and GMT. This free online course will be of great interest to students, researchers and anyone interested in celestial navigation. Register for this course and start your next learning journey today.Start Course Now
Horizon Types and Position Fixing
Horizon Types and Position Fixing - Learning Outcomes
Visible, Sensible and Rational Horizons
Time and Equation of Time
Horizon Types and Position Fixing - Lesson Summary
Position Finding by Planet, Star and Moon
Position Finding by Planet, Star and Moon - Learning Outcomes
Position Finding by Simultaneous and Staggered Observations
Position Lines by Means of Observations of Planet
Position Lines by Means of Observations of Star
Position Lines by Means of Observations of Moon
Position Finding by Planet, Star and Moon - Lesson Summary
Upon the completion of this course, you should be able to:
- Explain the features of the sextant altitude and rational horizon.
- Discuss the theoretically visible sunrise and sunset.
- Examine the relationship between time and longitude.
- Identify the purpose of zone, standard-times and their applications.
- List the methods of position fixing of a ship when the ship is out of sight of land.
- Identify various positions on the surface of the Earth.
- Explain the process of simultaneous and staggered observations.
- Discuss various position lines by means of observing the sun.
- Analyze the process of time of meridian passage.
- Identify various means of longitude correction for time of meridian passage.
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