Rules of the Road · Restricted Visibility
A vessel in restricted visibility detects another vessel by radar only, forward of the beam, and determines that close-quarters situation may develop. Under Rule 19(d), she shall:
- ASound five short blasts and alter course to port
- BReduce speed to the minimum at which she can be kept on course; if necessary, take all way off and navigate with extreme caution✓ Correct
- CImmediately alter course to starboard
- DMaintain course and speed until visual contact is established
Explanation
Rule 19(d) prohibits course alterations to port for a contact forward of the beam (except for overtaking) and requires reduction to minimum steerage way, or stopping if necessary. Reducing speed — not a bold course alteration — is the prescribed first response to a radar contact forward of the beam in fog.
Authority: 72 COLREGS Rule 19(d)
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