124 NAUTICAL CHART MANUAL 



Ledge (A-lld) A rocky formation continuous with and fringing the shore. 



The area that uncovers is usually represented on charts by 



symbols. 

 Levee (H-Sd) An artificial bank confining a stream channel or limiting areas 



subject to flooding; an embankment bordering on one or 



both sides of a submarine canyon or seachannel, usually 



occurring along the outer edge of a curve or meander. 

 Littoral Of or pertaining to a shore, especially seashore; a coastal 



region. (In the U.S., generally an adjective; also, not a 



material.) 

 Low-water line (A-10) The line where the established low-water datum intersects the 



shore. The plane of reference that constitutes the low-water 



datum differs in different regions. 

 Marina A harbor f acUity for recreational craft where supplies, repairs, 



and various services are available. 

 Marsh (C-17) A tract of low, wet ground, usually miry and covered with 



rank vegetation. It may, at times be sufl5ciently dry to 



permit tillage or haycutting, but requires drainage to make 



it permanently arable. 

 Mattress Mass of interwoven brush, poles, etc., used to protect a bank 



from erosion. 



Mesa A flat-topped, rocky hill with steep sides. (Southwestern U.S.) 



Moat An annular depression that may not be continuous, located at 



the base of a seamount or an island. 



Moraine Any accimmlation of loose material deposited by a glacier. 



Mound A low hill of earth, natural or artificial; in general, any promi- 

 nent, more or less isolated hiU. 

 Mount A mountain, or high hUl. Used always instead of "moimtain" 



before a proper name. 

 Mountain An elevation of the surface of the earth greater than a hill and 



rising high above the surrounding country. 



Mountain range A series of connected and aligned mountains or mountain ridges. 



Mouth The exit or point of discharge of a stream into another stream, 



lake, or sea. 

 Muskeg A bog or marsh. Local in north central United States, Canada, 



and Alaska. 

 Neck The narrow strip of land which connects a peninsula with the 



mainland, or connects two ridges. A lava-filled conduit of 



an extinct volcano, exposed by erosion. 

 Notch A short defile through a hill, ridge, or mountain. A deep, close 



pass; a defile; gap. Local in New England. 

 Ocean The great body of salt water which occupies two-thirds of the 



surface of the earth, or one of its major subdivisions. The 



sea as opposed to the land. 

 Outlet The opening by or through which any body of water discharges 



its content. 



