Admiralty law or maritime law is a distinct body of law that governs maritime questions and offenses. It is a body of both domestic law governing maritime activities, and private international law governing the relationships between private entities that operate vessels on the oceans. It deals with matters including marine commerce, marine navigation, marine salvaging, shipping, sailors, and the transportation of passengers and goods by sea. Admiralty law also covers many commercial activities, although land based or occurring wholly on land, that are maritime in character.
Admiralty law is distinguished from the Law of the Sea, which is a body of public international law dealing with navigational rights, mineral rights, jurisdiction over coastal waters and international law governing relationships between nations.
Although each legal jurisdiction usually has its own enacted legislation governing maritime matters, admiralty law is characterized by a significant amount of international law developed in recent decades, including numerous multilateral treaties.
Seaborne transport was one of the earliest channels of commerce, and rules for resolving disputes involving maritime trade were developed early in recorded history. Early historical records of these laws include the Rhodian law (Nomos Rhodion Nautikos), of which no primary written specimen has survived, but which is alluded to in other legal texts (Roman and Byzantine legal codes), and later the customs of the Consulate of the Sea or the Hanseatic League. In southern Italy the Ordinamenta et consuetudo maris (1063) at Trani and the Amalfian Laws were in effect from an early date.
Bracton noted further that admiralty law was also used as an alternative to the common law in Norman England, which previously required voluntary submission to it by entering a plea seeking judgment from the court.