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Celestial Navigation (Operational Level) (CNAV-OIC)

Individual Course / Program


15 Days

Training Method

Lecture, Demonstration, Practical Application






Terrestrial & Coastal Navigation (TCNAV)

Individual Course


Part of Program


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Course Description

This course (MITPMI-114) is required by all Able Seamen upgrading to 500/1600/3rd Mate licenses as it satisfies the OICNW training requirements for Celestial Navigation. The course covers the most common forms of position fixing by celestial bodies. Subjects for this course include nautical astronomy, sextant, sight reductions, time of sunset, time of sunrise, and star identification.  *Please note that this course was previously two weeks, but we have expanded to three weeks based on attendee feedback.

  • This course satisfies:
    • • The Celestial Navigation training requirements of 46 CFR 11.309(a)(4)(viii) and assessment tasks 1.1.A, 1.1.B, 1.1.C, 1.1.D, 1.1.E, and 1.1.F from NVIC 12-14 “Officer in Charge of a Navigational Watch” for an STCW endorsement as OICNW on vessels of 500 GT or more and Tasks 2.1.A, 2.1.B, and 2.1.C of NVIC 10-14. Applicants who have successfully completed this course need not present completed Task Control Sheets for these assessments in application for STCW certification; OR
      • The following Oceans Navigation professional examination requirements Navigational General: Oceans and Navigation Problems: Oceans:
            o To increase the scope of an endorsement as Master or Mate of self-propelled vessels of less than 500 or 1600 GRT from near coastal to oceans;
            o To increase the scope of an endorsement as Mate or Master of self-propelled vessels of less than 200 GRT from near coastal to oceans;
            o To increase the scope of an endorsement as Master or Mate of Uninspected Fishing Industry Vessels from near coastal to oceans.

Prerequisites- Terrestrial & Coastal Navigation (TCNAV).

Suggested Courses/Skills- See NVIC 12-14 & 13-14.

What You Will Learn

  • Use celestial bodies to determine the ship’s position
  • Identify and select stars
  • Determine estimated time of arrival
  • Adjust the sextant
  • Find latitude by Polaris
  • Determine the zone time of sunrise/sunset
  • Solve Parallel and Mercator sailing problems
  • Solve Great Circle and Composite Sailing problems
  • Use gnonomic charts for planning voyages
  • Nautical Astronomy
  • Sextant and Altitude Correction
  • Sight Reduction and Lines of Position (all
  • Meridian Transit (all bodies)
  • Time of Sunrise/Sunset
  • Star Identification and Selection

What You Should Bring

  • Dividers
  • Triangles
  • All practical Navigation Equipment
  • Calculator

Course Dates

Select the course date from the list below

MITAGS - Linthicum Heights, MD


PMI - Seattle, WA


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