Course modules

Radar modules

Work through the free preview modules first, then unlock the full course for every lesson, quiz, and flashcard.

The Radar Picture and Its Limits

What radar shows, what it hides, how radar wave propagation affects returns, and why interpretation matters.

Gain, sea clutter, rain clutter, tuning, range scale, trails, and display setup.

Using range rings, variable range markers, electronic bearing lines, and radar fixes.

Target strength, target definition, reflectors, shadows, and separating close echoes.

Relative motion, closest point of approach, target trails, and manual plotting discipline.

Using AIS and MARPA alongside radar without over-trusting either.

Parallel indexing, clearing ranges, contour awareness, and pilotage in poor visibility.

Radar use with COLREGs Rule 19 thinking, sound signals, speed, and lookout.

Decision practice for crossing targets, landfall, harbour approach, and false echoes.