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All questions
Navigation & chartwork

Even with radar operating normally, which duties and evidence remain part of the decision?

Short answer

Proper lookout, safe speed, required sound signals, all appropriate available means and COLREG judgement

The governing principle is integration rather than substitution: operational radar must be used properly, while lookout, safe speed, sound signals and collision-risk assessment continue. Revisit Release a Radar Conclusion.

Sources and scope

Reviewed by Richard Moore on . This answer is scoped to international collision-avoidance and small-craft radar practice; check the current chart, publication, local rules and official operational guidance before acting afloat.

Quick check

Even with radar operating normally, which duties and evidence remain part of the decision?