Block Island Sound is a marine sound in the open

Atlantic Ocean The Atlantic Ocean is the second largest of the world's five borders of the oceans, oceanic divisions, with an area of about . It covers approximately 17% of Earth#Surface, Earth's surface and about 24% of its water surface area. During the ...

, approximately wide, separating Block Island from the coast of mainland

Rhode Island Rhode Island ( ) is a state in the New England region of the Northeastern United States. It borders Connecticut to its west; Massachusetts to its north and east; and the Atlantic Ocean to its south via Rhode Island Sound and Block Is ...

. On the west, it extends to Montauk Point on the eastern tip of

Long Island Long Island is a densely populated continental island in southeastern New York (state), New York state, extending into the Atlantic Ocean. It constitutes a significant share of the New York metropolitan area in both population and land are ...

, as well as Plum Island, Gardiners Island, and Fishers Island, all in the state of New York. Geographically, Block Island Sound extends west to

Long Island Sound Long Island Sound is a sound (geography), marine sound and tidal estuary of the Atlantic Ocean. It lies predominantly between the U.S. state of Connecticut to the north and Long Island in New York (state), New York to the south. From west to east, ...

and east to Rhode Island Sound. The sound forms part of the Intracoastal Waterway. Three

United States Navy The United States Navy (USN) is the naval warfare, maritime military branch, service branch of the United States Department of Defense. It is the world's most powerful navy with the largest Displacement (ship), displacement, at 4.5 millio ...

warships have been named after the sound. See USS '' Block Island.''

References

Straits of New York (state) Straits of Rhode Island Intracoastal Waterway New Shoreham, Rhode Island Bodies of water of Washington County, Rhode Island Sounds of the United States {{RhodeIsland-stub