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.
Compass Revision course
Yachtmaster Ocean revision
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.
Syllabus map
What this course covers
Ocean Theory Pathway
FreeSource-reviewed pathway from prerequisite knowledge through recognised study, qualifying passage, on-board evidence, examination and exact award route.
Preview module
Celestial Sphere and Time
FreeSource-reviewed coordinate and time chain from body GP, GHA and declination through LHA, Aries and SHA, chronometer correction, UTC date and reconstructable sight records.
Preview module
Sextant Use and Corrections
A teaching-first correction chain from timed sextant altitude Hs through index correction, dip and body-specific tables to observed altitude Ho, with practical evidence limits.
Preview module
Sun Sights and Position Lines
A source-reviewed Ho–Hc intercept chain, assumed-position discipline, towards/away plotting, one-line evidence limits, and Sun-run-Sun transfer with uncertainty.
Preview module
Meridian Altitude and Latitude
Plan and bracket Sun upper transit, reduce corrected altitude to signed latitude, and audit a Sun-run-meridian position.
Preview module
Compass Checks by Celestial Body
Build a traceable same-time celestial bearing check, calculate signed compass error and separate current variation from heading-specific deviation.
Preview module
Ocean Passage Planning
Evidence-led route and season choice, fatigue-resilient watches, resource runway, vessel repair readiness, communications, landfall, and recorded plan changes.
Preview module
Worldwide Meteorology
Global circulation, moving wind regimes, pressure tendency, ITCZ and monsoon evidence, climatology, forecasts, warnings and onboard weather review.
Preview module
Tropical Revolving Storms
Tropical-cyclone formation limits, basin warning sources, centre-track and wind-extent evidence, hemisphere and motion reasoning, early avoidance, option expiry, and auditable handover.
Preview module
Emergency and Electronic Backup Navigation
Degraded-navigation recovery from the last trusted state through dependency tracing, bad-data isolation, DR uncertainty, independent position evidence, power and watch continuity, and auditable handover.
Preview module
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.