C.F.R. » Title 46 » CHAPTER I—COAST GUARD, DEPARTMENT OF HOMELAND SECURITY › SUBCHAPTER L—OFFSHORE SUPPLY VESSELS › PART 131—OPERATIONS › Subpart I—Miscellaneous

46 C.F.R. § 131.965

Sounding of whistle

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No vessel may sound its whistle within any harbor limits of the United States unless it needs to.