Definition
In international law, the right of approach is the authority of a warship on the high seas to draw near to another vessel for the limited purpose of ascertaining that vessel's nationality. It is a preliminary and narrower right than the right of search or visitation: the approaching warship may inspect the foreign vessel's flag and, if necessary, send a boat to verify the national character of the ship, but may not board, search, or detain without additional legal justification. The right applies on the high seas and does not depend on a state of war; it functions as a peacetime instrument of maritime order.
In modern practice and general legal usage, "approach" also appears frequently as a procedural term in trial practice — most commonly in the phrase "may I approach the witness" or "approach the bench," referring to counsel's request to move physically closer to the witness or judge. This courtroom usage is procedural convention rather than a defined legal right and is governed by judicial discretion.
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Common Language
Modern common usage (Wiktionary): To come or go near in place or time; to move toward; to draw nigh; to advance nearer.
Historical common usage (Webster's 1913): "To come or go near, in place or time; to draw nigh; to advance nearer." Also figuratively: to make advances; to approximate.
The ordinary meaning of approach — simply drawing near — is close in sense to both legal uses, but the international law meaning is a term of art. In maritime law, the right of approach is not merely a physical act but a recognized legal entitlement with defined limits and consequences. A warship approaching another vessel without legal justification commits a different act than one exercising the right of approach. The common word obscures this normative dimension.
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Common Confusion
The right of approach is frequently conflated with the right of visit and search (or right of visitation). They are related but distinct. The right of approach authorizes only enough contact to determine nationality — typically inspection of the flag. The right of visit and search goes further, authorizing boarding and inspection of papers or cargo under specified conditions (suspected piracy, slave trading, or statelessness). Rapalje & Lawrence signal this distinction by cross-referencing SEARCH as a separate entry. Researchers consulting historical sources should not treat the terms as interchangeable.
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Why It Matters in Research
The right of approach as a discrete legal concept is primarily a creature of 19th-century international law scholarship. All five source dictionaries trace the definition to the same passage — Kent's Commentaries on American Law, vol. 1, page 153 — suggesting the historical corpus on this point is narrow and originates from a single influential source. Researchers should treat this doctrinal lineage critically: the definition in Black's (1st and 2nd editions), Bouvier's, and Rapalje & Lawrence are materially identical, not independently derived.
Anderson's Dictionary of Law is unhelpful here, redirecting to BRIDGE without explanation — a reminder that historical dictionaries vary significantly in coverage and that cross-references in 19th-century legal dictionaries sometimes lead nowhere useful.
The concept has limited purchase in modern international law, where the law of the sea is codified. Researchers working on contemporary maritime issues should pivot to the United Nations Convention on the Law of the Sea (UNCLOS), particularly Article 110, which addresses the right of visit on the high seas and subsumes what historical sources called the right of approach within a more comprehensive framework. The older terminology will appear in historical treatises and 19th-century prize court decisions but is not the operative vocabulary of current international maritime law.
For researchers encountering "approach" in trial transcripts, procedural records, or litigation documents, the term is almost certainly being used in its courtroom sense — counsel requesting permission to approach the bench or witness — and has no connection to maritime law. Context will disambiguate, but the possibility of confusion across corpus types is real.
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Historical Dictionary Support
The five source dictionaries are in near-complete agreement, all grounding the definition in Kent's Commentaries and framing the right as a nationality-verification mechanism limited to the high seas. Black's 1st and 2nd editions are verbatim identical. Bouvier's and Rapalje & Lawrence track the same substance with minor phrasing variation. This convergence reflects the dominance of Kent as the American authority on maritime and international law in the 19th century rather than independent legal development of the concept.
What the historical dictionaries do not address: (1) the procedural trial usage of "approach," which was evidently too commonplace to merit definition; (2) any distinction between peacetime and wartime application of the right; and (3) the relationship between the right of approach and what we would now call flag state jurisdiction. Researchers should not expect historical dictionaries to map cleanly onto modern international law doctrine on these points.
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Jurisdictional Note
The right of approach operates under customary international law and, for treaty parties, under UNCLOS. It is not a matter of domestic U.S. law in the ordinary sense, though U.S. admiralty courts and prize courts historically applied and interpreted it. Domestic jurisdictional variation is not a meaningful variable for this term.
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