Lines dividing the high seas from rivers, harbors, and inland waters. The waters inshore of the lines are 'inland waters' and upon them the Inland Rules of the Road or Pilot Rules apply. The waters outside of the lines are the high seas and upon them the International Rules apply.

Related Terms


Officially the Inland Navigation Rules; Rules to be followed by all vessels while navigating upon certain defined inland waters of the United States.


The part of an inland ice sheet in which the ice flows more rapidly and not necessarily in the same direction as the surrounding ice. The margins are sometimes clearly marked by a change in direction of the surface slope, but may be indistinct.


1. A standing body of inland water, generally of considerable size. There are exceptions such as the lakes in Louisiana which are open to or connect with the Gulf of Mexico. Occasionally a lake is called a SEA, especially if very large and composed of salt water. 2. An expanded part of a river.


Consist of international straits, inland and interocean canals and rivers where they separate the territories of two or more nations. Provided no treaty is enforced both merchant ships and warships have the right of free and unrestricted navigation through these waterways.


An electronic system commonly used to prevent collisions in inland navigable waterways.


A system of through rates and service offered by a carrier for cargo shipments from any inland U.S. location to a port, by sea to a foreign port and finally overland to foreign inland destination.


The process of packing a container with loose cargo prior to inland or ocean shipment.


This person prepares the needed documentation for importing goods (just as a freight forwarder does for exports). The broker is licensed by the Treasury Department to clear goods through U.S. Customs. Performs duties related to documentation, cargo clearance, coordination of inland and ocean transportation, dockside inspection of cargo, etc. (Also known as a customhouse broker.)


Lines delineating the waters upon which mariners must comply with the International Regulations for Preventing Collisions at Sea 1972 (72 COLREGS) and those waters upon which mariners must comply with the Navigation Rules for Harbors, Rivers, and Inland Waters (Inland Rules). The waters outside the lines are COLREGS waters. For specifics concerning COLREGS Demarcation Lines see U.S. Code of Federal Regulations, Title 33, Navigation and Navigable Waters; Part 82, COLREGS Demarcation Lines.


The general region of indefinite width that extends from the sea inland to the first major change in terrain features. Sometimes called SEACOAST.

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