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International Fees

International fees are typically three times the amount of domestic fees. Exact cost will be calculated upon completion of registration.

Course details

This course provides students with a means to navigate a vessel by terrestrial and celestial methods. The course contents include shape of the earth and the graticule system; plane sailing; parallel sailing; Mercator and great circle sailing; determining a vessel's position by using celestial bodies; and theory and practice of sextant. It is strongly recommended that students should review algebraic and trigonometric functions prior to taking this course.


  • No prerequisites are required for this course.



Not offered this term
This course is not offered this term. Please check back next term or subscribe to receive notifications of future course offerings and other opportunities to learn more about this course and related programs.

Learning Outcomes

Upon successful completion of this course, the student will be able to:

  • Explain the concept of earth shape used for marine navigation.
  • Calculate the arrival and departure position, and determine course and distance using plane, parallel, and Mercator sailing.
  • Solve spherical triangles.
  • Calculate the course and distance between two points (places) using great circle sailing.
  • Describe composite great circle sailing.
  • Explain the solar system and celestial bodies useful for navigation.
  • Describe the celestial sphere and celestial bodies.
  • Define the equation of time.
  • Obtain celestial information using the Nautical Almanac.
  • Calculate azimuth and amplitude bearings of celestial bodies and to determine compass error.
  • Demonstrate proper use of the marine sextant.
  • Calculate the latitude and position line using latitude and meridian altitude method.
  • Calculate the longitude and position line by longitude by chronometer.
  • Calculate intercept using the Marc St. Hilaire method.
  • Transfer calculated position lines to obtain vessel's position.

Effective as of Spring/Summer 2012

Related Programs

Astro Navigation 2 (NAUT 1826) is offered as a part of the following programs:

School of Transportation

  1. Chief Mate
    Certificate Part-time
  2. Watchkeeping Mate Near Coastal (WKMNC)
    Certificate Part-time


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