Rules of the Road · Risk of Collision
Rule 7 cautions that scanty radar observations shall be:
- AUsed only as a supplement to visual bearings
- BNot relied upon without corroborating visual observations
- CPlotted before any conclusions are drawn✓ Correct
- DReported immediately to the master
Explanation
Rule 7(c) states that if there is any doubt, risk of collision shall be deemed to exist, and that scanty radar observations shall not be relied upon — they must be plotted or otherwise subjected to systematic observation. A single bearing is insufficient; a series must be taken to establish a trend.
Authority: 72 COLREGS Rule 7(c)
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