Rules of the Road · Restricted Visibility — Rule 19
Under Rule 19(d), a vessel which detects by radar alone the presence of another and determines risk of collision exists shall avoid an alteration of course to port for a vessel:
- AForward of the beam, other than for a vessel being overtaken✓ Correct
- BBeing overtaken
- CAbaft the beam
- DDead astern
Explanation
In restricted visibility, a vessel shall avoid an alteration of course to port for a vessel forward of the beam (other than one being overtaken), and avoid altering toward a vessel abeam or abaft the beam.
Authority: COLREGS/Navigation Rules, Rule 19(d)(i)
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