What to know for Restricted Visibility Radar
Integrate radar into a restricted-visibility plan that still uses safe speed, lookout, and sound signals.
Radar use with COLREGs Rule 19 thinking, sound signals, speed, and lookout. This module is mapped to the published course boundary for Marine Radar Revision and written as an independent revision aid, not official training material.
Key Points
- Radar is one available means, not the only means
- Safe speed must allow time to assess and act
- Sound signals and lights remain important
- Avoid assumptions about another vessel's awareness
Last reviewed: 6 July 2026 by Compass Revision curriculum review
Source notes
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