Definition
A charge imposed by law or custom for the act of mooring a vessel — that is, securing a ship by rope, cable, or chain to a fixed point on shore, such as a tree, post, pile, or wharf. In legal usage, moorage refers primarily to the fee or obligation arising from that act of securing, not merely the physical place where it occurs.
Modern usage has expanded the term to encompass three related but distinct concepts: (1) the act of mooring itself; (2) the designated location where a vessel is secured; and (3) the fee charged for the use of that location. Legal instruments — leases, port regulations, maritime liens, and local ordinances — may use the word in any of these senses, and context determines which meaning controls.
Common Language
Modern common usage (Wiktionary): The act of mooring; a place where a ship or aircraft may be moored; the fee for mooring.
Historical common usage (Webster's 1913): A place for mooring.
The gap matters for legal research. In ordinary English, moorage most naturally describes a location — a berth or slip. In legal contexts, and particularly in historical sources, moorage almost exclusively denotes the charge or fee owed, functioning as a form of toll or due analogous to wharfage or anchorage. A researcher encountering "moorage" in a contract or court record should not assume it refers to a physical place; it more likely refers to a monetary obligation.
Common Confusion
Moorage is frequently used interchangeably with wharfage and anchorage, but these are technically distinct charges. Wharfage is the fee for the use of a wharf structure itself — typically for loading and unloading cargo. Anchorage is the fee for lying at anchor in a harbor or roadstead, usually away from fixed structures. Moorage is the fee specifically for fastening a vessel to a fixed point onshore or to a wharf. In practice, port tariffs and older statutes often blur these distinctions, and historical courts did not always treat them as legally separate categories. A researcher should not assume that finding one term excludes the others; the underlying entitlement may overlap.
Why It Matters in Research
Moorage sits at the intersection of maritime law, property law, and local regulatory law — a position that creates several research traps.
First, the term's dominant legal meaning (a fee) diverges from its dominant common meaning (a place), and older statutes or contracts may exploit this ambiguity without resolving it. A marina lease granting "moorage rights" could be read as granting a location, a fee arrangement, or both.
Second, moorage charges have historically been treated as maritime liens in admiralty practice. Vessels can be arrested to satisfy unpaid moorage fees, placing this term squarely within federal admiralty jurisdiction in the United States, even when the underlying agreement looks like an ordinary landlord-tenant or property dispute. This jurisdictional dimension is easy to miss when the term appears in what looks like a real property document.
Third, the regulatory landscape for moorage has expanded significantly since the historical dictionaries were written. Modern researchers will encounter moorage in the context of marina regulations, liveaboard vessel ordinances, environmental permitting for docks and floats, and local zoning disputes — none of which appear in the historical sources.
Fourth, the historical citation (Wharf Case, 3 Bland (Md.)) is a Maryland equity decision and represents the primary judicial authority referenced across all three source dictionaries. This narrow foundation means the historical legal definition is drawn almost entirely from one jurisdiction's equity practice. Researchers working in other jurisdictions should not assume this single case establishes universal doctrine.
Historical Dictionary Support
All three source dictionaries — Black's (1st and 2nd editions) and Bouvier's — offer nearly identical definitions focused on moorage as a monetary sum due by law or usage for fastening a ship to shore structures or a wharf. The convergence is notable but unsurprising, as all three appear to draw from the same Maryland authority.
Bouvier's entry is the most spare, omitting the phrase "by law or usage" found in both Black's editions. That omission is minor but worth noting: the "by law or usage" language in Black's signals that moorage obligations could arise either from positive law (statute or ordinance) or from established custom — an important distinction in disputes over whether a charge was lawfully imposed.
None of the historical sources address moorage in the context of admiralty liens, liveaboard arrangements, or modern marina regulation. Their utility is primarily definitional and historical; they establish what the term meant at its legal baseline but do not capture how it functions in contemporary practice.
Jurisdictional Note
In the United States, moorage disputes may arise under federal admiralty jurisdiction when the claim involves a maritime lien against a vessel, but state law governs many marina contracts and waterfront property rights. Pacific Coast states — particularly Washington, Oregon, and California — have developed substantial bodies of state law and local regulation around moorage rights, liveaboard vessels, and marina tenancies that significantly expand beyond the historical common-law baseline.