Course scope
Independent revision aid only. It does not replace the RYA Radar Course, practical instruction, or onboard familiarisation with your own set.
Compass Revision course
Radar revision
Radar revision for small craft navigation, collision avoidance, restricted visibility, plotting, controls, and radar-pilotage decisions.
Independent revision aid only. It does not replace the RYA Radar Course, practical instruction, or onboard familiarisation with your own set.
Syllabus map
What this course covers
The Radar Picture and Its Limits
FreeHow pulse returns become a radar picture, why targets may be weak, merged, masked or false, and how to release a bounded radar-supported decision.
Preview module
Controls, Gain, and Clutter
FreeHow to diagnose a poor radar picture, test gain and clutter controls without losing weak targets, and verify range, orientation and set-up before relying on the display.
Preview module
Range, Bearing, VRM, and EBL
How to make auditable radar range and bearing measurements, use centred or offset VRMs and EBLs, plot radar fixes and create clearing ranges without hiding uncertainty.
Preview module
Targets, Reflectors, and Discrimination
How target geometry, aspect, heel, radar band, reflectors, clutter and range/bearing discrimination shape detection—and when a return must remain unresolved.
Preview module
Radar Plotting and CPA
Timed relative plotting, worked CPA/TCPA geometry, trails and vectors, tracking quality, action verification and a bounded plot-to-decision standard.
Preview module
AIS, MARPA, and Overlays
Source-aware use of AIS, radar tracking and chart overlays, including association, field age, filters, shared-input failures and disagreement diagnosis.
Preview module
Radar Navigation and Pilotage
Plan and monitor close navigation with parallel indexes, clearing ranges, independent progress and depth checks, actionable calls, mismatch diagnosis and abort margins.
Preview module
Restricted Visibility Radar
Apply Rule 19 with systematic radar observation, safe-speed time budgets, exact forward/abaft course cautions, fog-signal response, workload control and post-action verification.
Preview module
Radar Scenario Practice
Integrate collision, landfall, clutter, pilotage and failure evidence through traceable scenario briefs, safe-state control and post-action verification.
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.