Compass Revision course

Yachtmaster Ocean revision

Name: Yachtmaster Ocean and Astro Navigation Revision Revision
Price: 19.99 GBP
Availability: InStock

Premium revision for Yachtmaster Ocean theory, astro navigation, sextant use, sun sights, worldwide meteorology, tropical revolving storms, and ocean passage planning.

Independent revision aid only. It does not issue an RYA Yachtmaster Ocean shorebased certificate and does not replace invigilated exams, qualifying passages, or oral assessment.

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Course decision

Is Yachtmaster Ocean the right next step?

What this is: A self-guided revision companion that explains essential concepts, then helps you practise and test them. It supports—but does not replace—recognised instruction, practical training, assessment or certification. Access is a one-time payment, not a subscription.
Best for: Learners preparing for Yachtmaster Ocean
Study effort: Self-paced in short sessions; use the module total to plan your own pace.
Included: 10 revision modules with teaching-first lessons, guided practice, topic tests, recall and relevant interactive tools.
Formal qualification?: Independent revision aid only. It does not issue an RYA Yachtmaster Ocean shorebased certificate and does not replace invigilated exams, qualifying passages, or oral assessment.
Usually followed by: Record offshore and ocean experience
Access: £19.99 once for full revision access; no subscription.

Compass is independent revision, not an instructor-led course or awarding body.

Try 2 free revision modules Full revision access £19.99 See the usual next step

Syllabus map

What this course covers

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Ocean Theory Pathway

Free

Where Ocean theory sits after Coastal/Yachtmaster Offshore and what the official assessment expects.

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Celestial Sphere and Time

Free

Celestial coordinates, apparent movement, UTC, zone time, chronometer error, and sight timing.

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Sextant Use and Corrections

Taking an altitude, index error, dip, refraction, semi-diameter, and observation discipline.

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Sun Sights and Position Lines

Intercept method principles, assumed position, azimuth, plotting a position line, and transferred lines.

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Meridian Altitude and Latitude

Noon sights, meridian passage, declination, observed altitude, and latitude by sun.

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Compass Checks by Celestial Body

Using sun, moon, star, or planet bearings to check compass error.

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Ocean Passage Planning

Route choice, watch systems, crew management, stores, water, spares, communications, and emergency planning.

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Worldwide Meteorology

Global circulation, trade winds, ITCZ, pressure systems, routing weather, and ocean forecasts.

Preview module

Tropical Revolving Storms

Formation areas, seasons, dangerous semicircle concepts, avoidance, and practical routing caution.

Preview module

Emergency and Electronic Backup Navigation

Navigation without electronics, log records, dead reckoning, astro fallback, and equipment failure planning.

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Course scope

Independent revision aid only. It does not issue an RYA Yachtmaster Ocean shorebased certificate and does not replace invigilated exams, qualifying passages, or oral assessment.

How to use the guide

Work through each module lesson, test recall with the module quiz, and use the flashcards until the decision checks feel automatic. The content is written for revision and confidence building before formal training, assessment, or official documentation checks.