Definition
A maritime tort is a civil wrong cognizable under admiralty and maritime law by reason of the location where it occurs or its connection to maritime commerce. Two related but distinct tests have governed which torts qualify:
1. (Locality test, traditional) A tort committed on navigable waters — including the high seas and tidal waters — falls within admiralty jurisdiction regardless of any connection to maritime activity. The wrong's geographic occurrence on water was the primary, and often sole, trigger.
2. (Locality-plus-nexus test, modern) Under the framework developed in the latter twentieth century, a tort must not only occur on or over navigable waters but also bear a sufficient connection to traditional maritime activity. The connection analysis asks whether the general features of the incident have the potential to disrupt maritime commerce, and whether the activity giving rise to the tort has a substantial relationship to traditional maritime activity.
The category encompasses a broad range of wrongs: vessel collisions, injuries to seamen, longshoremen, and harbor workers, oil spills, cargo damage, and products liability claims arising from defective marine equipment. Once a tort qualifies as maritime, the substantive law applied is general maritime law — a federal common law developed by the courts — rather than the tort law of any particular state.
Common Confusion
Maritime tort is frequently confused with, or loosely used to mean, admiralty jurisdiction itself. They are related but not identical. Admiralty jurisdiction is the court's power to hear a case; maritime tort is the substantive category of wrong that, when present, gives rise to that jurisdiction in civil matters. A claim may involve admiralty jurisdiction (over a contract dispute, for instance) without involving a tort at all. Conversely, a tort committed on navigable waters may still be litigated in state court under the saving-to-suitors clause, even though it qualifies as a maritime tort — jurisdiction and forum are not the same question.
Maritime tort should also be distinguished from maritime crime and from maritime contract claims, both of which are also within admiralty jurisdiction but governed by separate doctrinal frameworks.
Core Elements
Because the modern test has constitutional and doctrinal dimensions that shape research outcomes, the two-part framework bears structured attention:
1. Locality: The tort must occur on navigable waters or, for torts originating on land with effects on water (or vice versa), must satisfy the Extension of Admiralty Jurisdiction Act's reach.
2. Maritime nexus (two prongs):
a. Potential disruption of maritime commerce: Would this general type of incident, if it occurred, have the potential to disrupt maritime commerce?
b. Substantial relationship to traditional maritime activity: Was the activity giving rise to the harm one that bears a substantial relationship to traditional maritime activity?
Failure on either prong of the nexus test defeats maritime tort status even when the tort plainly occurred on navigable water.
Why It Matters in Research
The single most important navigational fact for corpus researchers is the doctrinal shift caused by the Supreme Court's locality-plus-nexus framework, fully consolidated by the 1990s. Sources predating this shift — including nearly all treatises and cases before the early 1970s — apply a pure locality test. A researcher reading nineteenth-century admiralty opinions or early Black's editions will find "maritime tort" defined essentially as any tort on navigable water, full stop. That definition is incomplete under modern law and will mislead analysis of contemporary disputes.
The tidal waters boundary is a persistent trap in historical sources. Bouvier's entry hints at the tension: admiralty jurisdiction over tidal waters was settled earlier and with less controversy than jurisdiction over purely inland navigable rivers. Pre-twentieth-century sources may describe the jurisdictional reach more narrowly than modern law allows, particularly for torts on major inland waterways.
Researchers should also track the interaction between maritime tort doctrine and state law. The saving-to-suitors clause preserves common-law remedies in state court, meaning that a maritime tort can simultaneously be litigated as a state negligence claim. Sources that treat admiralty jurisdiction as exclusive overstate the modern rule.
Products liability as a maritime tort is a relatively recent doctrinal development — the encyclopedia entry on Maritime Products Liability is the correct next stop for corpus research on defective marine equipment claims, where general maritime law and state products liability frameworks can conflict.
For seamen's personal injury claims specifically, note that the Jones Act creates a distinct statutory cause of action that overlaps with but is not coextensive with the general maritime tort framework. Jones Act claims have their own corpus trail and should not be conflated with pure admiralty tort actions.
Historical Dictionary Support
Black's definition — "a tort committed upon the high seas, or upon a navigable river" — is the pure locality test in its most compressed form. It is accurate as far as it goes for the era it describes, but it omits the nexus requirement entirely, making it an incomplete guide to modern doctrine.
Bouvier is more useful here. The entry acknowledges the tidal waters question as an area of genuine doctrinal development and gestures toward the unresolved boundary between sea-adjacent waters and purely inland navigable waterways. The citation to 17 Fed. Rep. 887 is characteristic of Bouvier's method of grounding definitions in federal court practice. The incompleteness of Bouvier's entry — it cuts off mid-sentence on the tidal question — reflects the genuinely unsettled state of admiralty tort jurisdiction in the period when that edition was compiled.
Neither source addresses the nexus requirement, which postdates both dictionaries. Neither addresses maritime products liability as a category. Both sources assume the admiralty court itself as the primary forum, giving insufficient weight to the saving-to-suitors clause's role in allowing parallel state court litigation.
Jurisdictional Note
Maritime tort doctrine is federal in character — general maritime law governs substantive rights, and federal courts have admiralty jurisdiction under Article III. However, state courts exercise concurrent jurisdiction under the saving-to-suitors clause, and state law may supplement general maritime law in some circumstances, particularly for wrongful death and loss of consortium claims where federal maritime law has historically provided incomplete remedies.
Encyclopedia Cross-Reference
Maritime Jurisdiction — Navigable Waters, Maritime Nexus (Executive Jet, Jerome B. Grubart) — The Law Mind Military, Veterans & Admiralty Law Encyclopedia
Maritime Products Liability — Applying General Maritime Law to Defective Products — The Law Mind Military, Veterans & Admiralty Law Encyclopedia
Maritime Liens — Creation, Priority, and Enforcement Through In Rem Arrest — The Law Mind Military, Veterans & Admiralty Law Encyclopedia