A HYDROLANT warning would normally be sent for all of the following EXCEPT __________.
Official USCG Answer & Rule Citation
Correct Answer: Option D — extinguishment of Robbins Reef Light in New York City's Upper Bay
HYDROLANT and HYDROPAC warnings address long-range oceanic hazards. Localized aids to navigation discrepancies, such as the extinguishment of Robbins Reef Light inside New York Harbor, are broadcast via local Notice to Mariners or USCG Broadcast Notices.
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