The NAVatHOME RYA Ocean Yachtmaster is one of our flagship courses. It is the ultimate RYA theory course for those with a real interest in serious blue water sailing or for those who wish to master all aspects of the art of navigation,
and to find your position with sun and stars. The course teaches the concepts that allow celestial navigation to work. This course is a requirement for those wishing to work on larger vessels, but is great fun for everyone.
This course is supported by the instructors at our sister school NAVatHOME.com. While we would love to teach it, this is a case where the instructors for the Ocean thoery at NAVatHOME are world class. This course is by far
the best Astro Navigation course available, and in our opinion it easily surpasses alternative online or classroom based training with our students able to take their time to explore and grasp the challenging aspects of astro navigation.
All the usual pictures that are normally provided as still slides are fully animated providing a learning opportunity not to be missed.
To successfully complete the Ocean Yachtmaster theory course, candidates should have a sound knowledge of navigation. But if your interest is to learn how to use a sextant for curiosity, then there is no reason why you could
not successfully enrol in this course.
- The earth and the celestial sphere.
- Definition of observer’s zenith and position of a heavenly body in terms of latitude, longitude, GHA and declination
- Right angle relationships, latitude and co-lat, declination and polar distance
- Relationship between GHA, longitude and LHA
- Tabulation of declination in nautical almanac
- Rate of increase of hour angle with time
- The PZX triangle
- The tabulated components of the triangle, LHA, co-lat and polar distance
- The calculable components, zenith distance and azimuth
- Relationship between zenith distance and altitude
- Introduction to the tabular method of solution in the Air Navigation Tables and the basic sight form
- The use of calculators for the solution of the PZX triangle
- Compass checking
- Use of amplitude and azimuth tables systems and/or calculator
- Satellite Navigation Systems
- Principles and limitations of use of all systems
- The sextant
- Practical guide to the use and care of a sextant at sea
- Conversion of sextant altitude to true altitude
- Application of dip, index error and refraction
- Correction of side error, perpendicularity, index error and collimation error
- Measurement of time
- Definition of, and relationship between, UT, LMT, standard time and zone time
- Rating of chronometers and watches
- Meridian altitudes
- Forecasting time of meridian altitude
- Reduction of meridian altitude sights
- Sun, star and other sights
- Reduction and plotting of sun sights using Air Navigation Tables
- Awareness of use of calculator for sight reduction
- The plotting of sun-run-sun meridian altitude
- Satellite and terrestrial systems
- Weather information
- Great circle sailing
- Comparison of rhumb lines and great circles
- Vertices and composite tracks
- General pressure distribution and prevailing winds over the oceans of the world
- Tropical revolving storms, seasonal occurrence and forecasting by observation
- Passage planning
- Publications available to assist with planning of long passages (routeing charts, ocean passages of the world and other publications)
- Preparation for ocean passage including survival equipment, victualing, water and fuel management, chafe protection, spares and maintenance
- Passage making
- Navigational routine
- Watch keeping
- Crew management
- Awareness of the reduction and plotting of sights obtained from stars, moon and planets
- The computation of a series of rhumb lines approximating to a great circle by use of gnomonic and Mercator projections
The student logon link will direct you to our sister school student login page at NAVatHOME.com. If this is your first time doing a NAVatHOME course, we reccomend you complete the free introductory course so that you are aware of the style of the course
before booking. NAVatHOME RYA courses, like NAVatHOME Australia, have evolved during fifteen years experience and continue to be successful in our learning tecniques and the interactive animated diagrams used in the courses.
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Navathome Australia is a family business based in Western Australia.
The School Principal is an RYA Yachtmaster instructor and has a Master Class 5 for power and sail.
The Punchlist Group Pty Ltd, ACN 647 832 997