RYA Yachtmaster Ocean Theory


All of our online theory courses are delivered by Navathome, an RYA Recognised Training Centre specialising in online training. This course has been developed over many years and is written to provide a thorough understanding of the syllabus. 

Unravel the mysteries of astro navigation, using a sextant, ocean passage making, worldwide meteorology and electronic navigational aids. Navathome has 100% pass rates for this course and has dedicated instructors available 7 days a week from 0800 until 2000 in the evening and are contactable by email or phone. 

Prior knowledge to coastal skipper theory level is required as this course is aimed at those aspiring to blue water cruising and perhaps preparing for your first ocean passage. Anyone who is already comfortable with navigation from the coastal theory course can learn more about celestial navigation. 

Course Requirements and Assessments

Prior to the course your navigation skills should be at the standard of the Coastal Skipper/Yachtmaster Offshore shorebased course.
A sextant is not required to complete the RYA Yachtmaster Ocean theory.

Invigilated assessments

If you are looking to sit the RYA/MCA oral exam, the RYA require the theory assessment to be invigilated by a Yachtmaster Ocean Instructor – alternatively you can sit an extra paper as part of your oral exam. If you wish to take an invigilated assessment at the end of the course rather than sit an extra paper during your oral exam, then this can be organised at one of Navathome’s participating training centres. Please note that there is an additional fee for the invigilation.

Please note: MCA issued full STCW Certificate of Competence as a Deck Officer (Unlimited) will be exempt from the written examination. Invigilation of the final assessment will also be required if the qualification is to be used commercially.


The course takes approximately 40 hours to complete with a 2 part assessment taken in one sitting of 2 hours.

Given that everyone learns at their own pace. There is an initial 6 months time limit to complete the course with a further 6 month extension available at a cost of an additional £30 fee.

What's Included?

  • Fully animated lessons
  • Downloadable proformas and plotting sheets
  • Access to the online course for a period of 6 months
  • Friendly instructors available 7 days a week
  • 2 years access to the revision course
  • RYA certification issued by Navathome upon successful completion of the course
  • The RYA Yachtmaster Ocean Course includes the RYA question paper and almanac

Course Syllabus

  • The earth and the celestial sphere
  • Practical guide to use and care of sextant at sea
  • Meridian altitudes
  • Sun, star and other sights
  • Ocean passage planning

Registration And Price

Please read the Navathome Terms & Conditions and the Navathome Data Protection Policy prior to booking as they outline all details of the booking with Navathome.

The cost of this course is £275

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