acmelogo.gif (2089 bytes) Celestial Navigation
Table of Contents

Site Format and Use


Navigational Arithmetic

The Answer

Lesson 1: Familiar Coordinates and References

Lesson 2: Celestial Coordinates

Lesson 3: Time Diagram

Lesson 4: Time

Lesson 5: Nautical Almanac

Lesson 6: Diagram on the Plane of the Celestial Meridian

Lesson 6b: Diagram on the Plane of the Celestial Meridian and the Navigational Triangle

Lesson 7: Sight Reduction, Tabular Resolution

Lesson 8: Sextant observations and corrections

Lesson 9: Lines of Position (LOP)

Lesson 10: The x-Body Fix

Lesson 11: Latitude at Local Apparent Noon (LAN), Special Observations

Final Exam Problems

Instructor:  Harry H. Dresser, Jr., Ed.D.

Celestial Navigation has been taught as a mathematics elective at Gould Academy for over twenty years.  This course was made more widely available through cyberacademy, Gould's experimental technologically mediated learning site. This was an effort to share this traditional offering with other students at the same time that Gould Academy explores technologically mediated learning for all ages.

This course is being offered now, in the spring of 2002. The course takes approximately four months to complete.  If you'd like to be considered as a student in this course, you must be in touch with the instructor by sending e-mail to

 This course will require significant independent study and learning, largely through the use of a textbook.  The required textbook is The American Practical Navigator, Nathaniel Bowditch.  The American Practical Navigator is a government publication available through most large bookstores and through many government chart agents. The book is also available on CD-ROM from Starpath Corporation, if you prefer viewing the text on the screen.  Regular assignments and discussion board conversations among students and the instructor and e-mail correspondence with the instructor will supplement the individual study. 

Copyright 2000, Harry H. Dresser, Jr.,Ed.D. .  All rights reserved. All information deemed reliable but not guaranteed.  Revised March 20, 2002 (the date of the vernal equinox)