Yachtmaster Ocean Theory Course (Starts October 5th)

CA House, Limehouse, E14, London, 5/6, 12/13 & 19/20 October

The RYA Yachtmaster Ocean Theory Course examines astro-navigation, the use of the sextant and worldwide meteorology. It assumes a knowledge of all the subjects covered in all the other shorebased courses.

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Location:
CA House, Limehouse, E14, London
Date:
5/6, 12/13 & 19/20 October
Price:
£397

For centuries sailors have guided their ships across the oceans by celestial navigation or nautical astronomy. On the RYA Yachtmaster Ocean Theory Course you will learn how to fix your position with a sextant by observing the sun, moon, stars and planets. For the modern sailor it is not only a fascinating art, but an essential alternative to electronic navigation when crossing oceans.


This course is for those aspiring to blue water cruising and is ideal for holders of the Yachtmaster Offshore certificate of competence who are preparing for their first ocean voyage. It is also suitable for those who enjoy and have a general interest and curiosity in navigation and how one can find a position by using a sextant and the heavenly bodies.

Minimum Pre Course Experience: Coastal and offshore sailing. Prior to the course your navigation skills should be at the standard of the Coastal Skipper Yachtmaster Offshore shorebased course.

Ability after the Course: Background knowledge to skipper a yacht on ocean passages.

Course Content: Astro-navigation, ocean meterology.

We provide a comprehensive set of materials to assist you with the course including:

RYA questions and answers The RYA Astro Navigation Handbook. For those wanting the full Yachtmaster Ocean certificate we can help arrange the 600-mile qualifying passage.

Some difficult principles to grasp! It takes a while to get to grips with the principles of astro navigation so do not be put off if you don't understand everything you will be taught straight away.

A knowledgeable instructor who will give you plenty of support if you need it.

Not a great idea with this course.

This is a course in astro-navigation and worldwide meteorology which also reveals the mysteries of the sextant. It assumes a knowledge of all subjects covered in the other shorebased courses.

    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-late, 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
  • 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 a sun-run-sun meridian altitude
  • Awareness of the reduction and plotting of sights obtained from stars, moon and planets
  • Compass checking

  • Use of amplitude and azimuth tables systems and/or calculator
  • Satellite Navigation Systems
  • Principles and limitations of use of all systems
  • Great circle sailing

  • Comparison of rhumb lines and great circles
  • Vertices and composite tracks
  • The computation of a series of rhumb lines approximating to a great circle by use of gnomonic and Mercator projections
  • Meteorology

  • 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, victualling, water and fuel management, chafe protection, spares and maintenance
  • Passage making

  • Navigational routine
  • Watch-keeping
  • Crew management
  • Communications

  • Satellite and terrestrial systems
  • Weather information

You will need a set of dividers which you will probably have from the Yachtmaster Shorebased course.

You will also need a pair of drawing compasses. You can buy these at stores that supply mathematical instruments for school students doing geometry.

We advise bringing a briefcase or bag to transport the course materials away on the first night.

"What did you like most about about your course? Well-defined and beautifully balanced act between people, didactics and technology. Combo is rarely achieved successfully but it hits the bull's eye! How would you rate the support you received during your course on a scale of 1 to 5 with 1 being very poor and 5 being excellent? 5 no doubt. From the first feedback onwards it's guaranteed you are not alone! I like the way anecdotes and facts are sprinkled occasionally alongside the syllabus, like recent ship wrecks in the Channel, etc. This certainly makes reading more interesting as text books tend to be somewhat drier. Please use any occasion to exploit that approach. That enriches the reader immensely as it is first-hand knowledge in its purest form, and that is certainly difficult to obtain anywhere else. Well done. "

LJ,

"The Instructor was an excellent coach and really took the time with our class to ensure we all understood all aspects of the course. He was patient and prepared to take the time to ensure we all had the best knowledge transferred to us. He was an excellent instructor and had a significant amount of detailed knowledge that was most helpful to me and the rest of the class. He is passionate and fully committed to his work and goes above and beyond to ensure you are capable and have a really enjoyable experience learning with him. First Class Sailing are well organised and the logistics, course material and facilities were all top notch "

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Robert A.,

"Good entertaining tuition. Lots of anecdotes to make it interesting, great practical experience."

Nick S.,

"The booking was well handled and the confirmation emails received speedily. Very helpful to receive pre course notes. Professional, helpful, good value. "

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"Friendly informative courses delivered in a relaxed environment by knowledgeable instructors. "

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Book Here Today!
Location:
CA House, Limehouse, E14, London
Date:
5/6, 12/13 & 19/20 October
Code:
4091
Format:
3 Weekends
Price:
£397

RYA Practical Courses

On the water courses that teach the beginner how to be a useful crew member and the advanced how to cross oceans.

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RYA Theory Courses

Shorebased navigation classes that prepare you to safely find your way once afloat.

One Day RYA Courses

One day courses that broaden your knowledge and compliment the RYA practical and navigation courses.

Contact us
0203 006 3717
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Shamrock Quay

William Street

Southampton

Hampshire

SO14 5QL

London

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