Definition
A Navigation Act is a trade and shipping statute restricting the carriage of goods to vessels of a particular national registry, typically requiring that imports and exports move only in ships owned and crewed by subjects of the enacting sovereign. In Anglo-American legal history, the term refers specifically to the English Navigation Acts, most prominently the statute of 12 Car. II. c. 18 (1660), which required that trade with English colonies be conducted exclusively in English-built, English-owned, and predominantly English-crewed vessels. The Acts also designated certain "enumerated commodities" — including tobacco, sugar, and indigo — that could only be shipped to England or other English colonies, not directly to foreign markets.
The Navigation Acts formed a comprehensive mercantilist regulatory system, comprising the 1660 statute and a series of related measures extending through the seventeenth and eighteenth centuries. They were a central grievance underlying colonial discontent in British North America and featured prominently in the political and legal debates preceding the American Revolution. The Acts were progressively relaxed during the early nineteenth century and ultimately repealed by statutes of 6 Geo. IV (1825).
Common Confusion
The term "Navigation Act" is sometimes loosely applied to any statute governing navigation, shipping, or waterways. This is misleading in historical legal sources. In English and early American legal literature, "the Navigation Act" almost invariably refers to 12 Car. II. c. 18 or the broader Navigation Acts system, not to general maritime regulations or rules of the road at sea. Modern statutes governing vessel traffic, safety, or waterway use are distinct bodies of law and should not be conflated with the colonial-era Navigation Acts.
Why It Matters in Research
For researchers in the Law Mind corpus, Navigation Act is primarily a term of historical English and early American law, not a living doctrine. Several navigational traps apply:
First, the term has a narrow technical reference in historical sources. When Bouvier and Burrill cite "the Navigation Act," they mean the 1660 statute specifically. Researchers consulting colonial-era case law, parliamentary debates, or early American constitutional materials will encounter this reference repeatedly, and it must be read in that context rather than as a generic category.
Second, the Navigation Acts are deeply entangled with constitutional and commercial law questions in early American history. Disputes over their enforcement implicated the power of colonial assemblies, admiralty jurisdiction, and the reach of parliamentary authority — all live issues during the founding era. Researchers tracing the development of the Commerce Clause or admiralty jurisdiction will find Navigation Acts cases and commentary indispensable background.
Third, repeal history matters. Both Bouvier and Burrill note the repeal by 6 Geo. IV statutes (1825). Sources written before that date treat the Acts as operative law; sources written after treat them as abrogated. Dating your source relative to 1825 will determine which interpretive frame applies.
Fourth, the Navigation Acts are not a precursor to modern U.S. navigation law. The modern regulatory framework governing navigable waters, vessel operation, and waterway jurisdiction derives from entirely separate statutory lineages — the Rivers and Harbors Act, the Clean Water Act, COLREGS, and related federal statutes. Do not assume doctrinal continuity between the colonial Navigation Acts and contemporary navigation law.
Historical Dictionary Support
Both Bouvier and Burrill treat Navigation Act as a term of fixed reference, identifying it with 12 Car. II. and noting repeal. Burrill provides slightly more bibliographic depth, citing Blackstone's Commentaries (2 Bl. Com. 419) and Stephen's Commentaries (3 Steph. Com. 272–273), giving researchers useful secondary entry points into the historical analysis. Bouvier's entry is notably sparse — little more than the statute number and the repeal citation — suggesting the editors viewed the term as adequately self-defining for practitioners of their era. Neither dictionary addresses the broader system of Navigation Acts beyond the principal 1660 statute, nor do they engage with the colonial enforcement controversies or the Acts' constitutional significance in American history. For that dimension, researchers must look beyond the historical dictionaries to sources like Blackstone, Chitty on Commercial Law, or the historical record of colonial admiralty courts.
Jurisdictional Note
The Navigation Acts were statutes of the English and later British Parliament with extraterritorial application to the colonies. After American independence, they ceased to have legal force in the United States. No American jurisdictional equivalent replaced them directly; U.S. cabotage law (restricting coastal trade to U.S.-flagged vessels) is the closest functional analog and operates under entirely different statutory authority.
Encyclopedia Cross-Reference
The Law Mind Military, Veterans & Admiralty Law Encyclopedia — Collision: Navigation Rules (COLREGS), Fault, and Divided Damages (for modern vessel navigation law, contrasted with the historical Acts)
The Law Mind Property Law Encyclopedia — Coastal and Navigable Waters: Public Trust Doctrine (for the distinct public rights framework governing navigable waters)
The Law Mind Environmental & Energy Law Encyclopedia — Navigable Waters, Waters of the United States, and Jurisdiction (for the modern regulatory meaning of "navigable waters")