Source boundary
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
FreeWhat radar shows, what it hides, how radar wave propagation affects returns, and why interpretation matters.
Preview module
Controls, Gain, and Clutter
FreeGain, sea clutter, rain clutter, tuning, range scale, trails, and display setup.
Preview module
Range, Bearing, VRM, and EBL
Using range rings, variable range markers, electronic bearing lines, and radar fixes.
Preview module
Targets, Reflectors, and Discrimination
Target strength, target definition, reflectors, shadows, and separating close echoes.
Preview module
Radar Plotting and CPA
Relative motion, closest point of approach, target trails, and manual plotting discipline.
Preview module
AIS, MARPA, and Overlays
Using AIS and MARPA alongside radar without over-trusting either.
Preview module
Radar Navigation and Pilotage
Parallel indexing, clearing ranges, contour awareness, and pilotage in poor visibility.
Preview module
Restricted Visibility Radar
Radar use with COLREGs Rule 19 thinking, sound signals, speed, and lookout.
Preview module
Radar Scenario Practice
Decision practice for crossing targets, landfall, harbour approach, and false echoes.
Preview module