Nantucket Shoals is an area of dangerously shallow water in the

Atlantic Ocean The Atlantic Ocean is the second-largest of the world's five oceans, with an area of about . It covers approximately 20% of Earth's surface and about 29% of its water surface area. It is known to separate the " Old World" of Africa, Europe ...

that extends from

Nantucket Island Nantucket () is an island about south from Cape Cod. Together with the small islands of Tuckernuck and Muskeget, it constitutes the Town and County of Nantucket, a combined county/town government that is part of the U.S. state of Massachuse ...

Massachusetts Massachusetts (Massachusett: ''Muhsachuweesut Massachusett_writing_systems.html" ;"title="nowiki/> məhswatʃəwiːsət.html" ;"title="Massachusett writing systems">məhswatʃəwiːsət">Massachusett writing systems">məhswatʃəwiːsət'' En ...

, eastward for and southeastward for ; in places water depth can be as shallow as . Depth soundings are unpredictable due to the constant change caused by strong currents, which are rotary rather than reversing. The

shoals In oceanography, geomorphology, and geoscience, a shoal is a natural submerged ridge, bank, or bar that consists of, or is covered by, sand or other unconsolidated material and rises from the bed of a body of water to near the surface. It ...

lie just off of a major transatlantic

shipping lane A sea lane, sea road or shipping lane is a regularly used navigable route for large water vessels (ships) on wide waterways such as oceans and large lakes, and is preferably safe, direct and economic. During the Age of Sail, they were determined ...

. Numerous ships have been wrecked here, most recently and notably the

oil tanker An oil tanker, also known as a petroleum tanker, is a ship designed for the bulk transport of oil or its products. There are two basic types of oil tankers: crude tankers and product tankers. Crude tankers move large quantities of unrefined ...

'' Argo Merchant'' in December 1976. Until 1983, the edge of the shoals was guarded by the Nantucket Lightship. Argo Merchant run aground

Nantucket Shoals is made up of the following features: *Asia Rip *Davis Bank *Fishing Rip *Middle Rip *Phelps Bank According to the 2010 edition of the '' United States Coast Pilot'', the

International Maritime Organization The International Maritime Organization (IMO, French: ''Organisation maritime internationale'') is a specialised agency of the United Nations responsible for regulating shipping. The IMO was established following agreement at a UN conference ...

has established an "area to be avoided" for the Nantucket Shoals. Vessels transporting oil or hazardous materials and vessels of more than 1,000

gross tons Gross tonnage (GT, G.T. or gt) is a nonlinear measure of a ship's overall internal volume. Gross tonnage is different from gross register tonnage. Neither gross tonnage nor gross register tonnage should be confused with measures of mass or weig ...

should avoid the area bounded by the points in the below table.

References

External links

* * Landforms of the Atlantic Ocean Landforms of Nantucket, Massachusetts Shoals of the United States {{NantucketCountyMA-geo-stub