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CFR > Title 46 - Shipping > CHAPTER I—COAST GUARD, DEPARTMENT OF HOMELAND SECURITY > SUBCHAPTER U—OCEANOGRAPHIC RESEARCH VESSELS (parts 188 to 196) > PART 188—GENERAL PROVISIONS > SUBPART 188.10—Definition of Terms Used in This Subchapter (§188.10-1 to §188.10-77) > 188.10-51—Ocean.
188.10-51—Ocean.
Under this designation shall be included all vessels navigating the waters of any ocean, or the Gulf of Mexico more than 20 nautical miles offshore.