Course modules
Start with the free revision module, then unlock all practice and revision features.
Getting started
Work through the revision path in order, then use each module's Practise and Test steps and flashcard pass to turn reading into recall.
2 modules are open now. Start with the teaching-first lesson beside this introduction; placement remains optional.
2 modules
Open another available module when you are ready.
Module 1
Not startedHow pulse returns become a radar picture, why targets may be weak, merged, masked or false, and how to release a bounded radar-supported decision.
8 topics · Learn, Practise and Test
Module 2
Not startedHow 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.
8 topics · Learn, Practise and Test
7 modules
Preview a representative lesson, then unlock full revision access when you are ready to continue.
Module 3
Premium lockedHow 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.
8 topics · Learn, Practise and Test
Module 4
Premium lockedHow target geometry, aspect, heel, radar band, reflectors, clutter and range/bearing discrimination shape detection—and when a return must remain unresolved.
10 topics · Learn, Practise and Test
Module 5
Premium lockedTimed relative plotting, worked CPA/TCPA geometry, trails and vectors, tracking quality, action verification and a bounded plot-to-decision standard.
11 topics · Learn, Practise and Test
Module 6
Premium lockedSource-aware use of AIS, radar tracking and chart overlays, including association, field age, filters, shared-input failures and disagreement diagnosis.
10 topics · Learn, Practise and Test
Module 7
Premium lockedPlan and monitor close navigation with parallel indexes, clearing ranges, independent progress and depth checks, actionable calls, mismatch diagnosis and abort margins.
8 topics · Learn, Practise and Test
Module 8
Premium lockedApply Rule 19 with systematic radar observation, safe-speed time budgets, exact forward/abaft course cautions, fog-signal response, workload control and post-action verification.
9 topics · Learn, Practise and Test
Module 9
Premium lockedIntegrate collision, landfall, clutter, pilotage and failure evidence through traceable scenario briefs, safe-state control and post-action verification.
8 topics · Learn, Practise and Test
Audio Challenge
Five spoken decisions with authored answers, reviewed explanations, and no microphone.
Audio revision is available. Listen to 9 short recaps alongside the modules.