RYA Yachtmaster Ocean — xplor School

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YM-OCEAN-M1 · Astro-navigation

3 lessons

YM-OCEAN-M1-A Sextant work, the sun and stars, meridian passage and compass checks for the ocean navigator. Practice in examiner →

YM-OCEAN-L1.1

The sextant and the principle of a sight

Astro-navigation lets the navigator fix position anywhere on Earth from the sun and stars, and it remains the ocean sailor's independent backup when the electronics fail. This lesson covers the sextant and how a single observation becomes a line on the chart.

YM-OCEAN-L1.2

Sun sights and the noon latitude

The sun is the ocean navigator's workhorse, worked through the day for position and to check the compass. This lesson covers the practical sun-run-sun day and the meridian-passage latitude that anchors it.

YM-OCEAN-L1.3

Star and planet sights and compass checks

At twilight the navigator can shoot several bodies at once against a clear horizon, giving a rapid and reliable multi-body fix. This lesson covers star and planet sights and using the sky to check the compass.

YM-OCEAN-M2 · Ocean passage-making

3 lessons

YM-OCEAN-M2-A Worldwide meteorology, routeing, passage planning, provisioning, communications and heavy-weather command. Practice in examiner →

YM-OCEAN-L2.1

Worldwide meteorology and ocean routeing

Ocean passages cross climatic zones and storm regions that a coastal sailor never meets, so the ocean navigator plans by season and by the climatology of the whole route. This lesson covers worldwide meteorology and the routeing that keeps a boat out of the worst of it.

YM-OCEAN-L2.2

Ocean passage planning and provisioning

An ocean passage means weeks at sea beyond any help, so the boat, the crew and the stores must all be prepared for self-sufficiency and for things going wrong. This lesson covers planning and provisioning an ocean voyage.

YM-OCEAN-L2.3

Communications, safety and heavy-weather command

Far offshore the communications, the safety equipment and the heavy-weather decisions all rest on the skipper alone, with no coastguard a short call away. This lesson pulls those together for ocean command.

Aligned to the published MCA syllabus. Official syllabus (GOV.UK).

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