A belt of water of a defined breadth but not exceeding 12 nautical miles measured seaward from the territorial sea baseline.

A chart specifically designed to meet the requirements of marine navigation, showing [depth/depths]] of water, nature of bottom, elevations, configuration and characteristics of coast, dangers and aids to navigation. May be a paper chart, electronic navigational chart (ENC) or a raster navigational chart (RNC). Also called marine chart, hydrographi [..]

NOAA is a scientific agency within the United States Department of Commerce focused on the conditions of the oceans and the atmosphere. In relation to bathymetry and global relief NOAA provides scientific stewardship, products, and services for ocean depth data and derived digital elevation models.

The average height of all low waters at a place over a 19-year period.

See Intertidal Zone

The lowest tide level which can be predicted to occur under average meteorological conditions and under any combination of astronomical conditions.

The intertidal zone (also known as the littoral zone) is generally considered to be between mean high water and mean low water.

Waters on the landward side of the baseline of a nation's territorial waters. It includes waterways such as rivers and canals, and the water within small bays.

Surveys prepared specifically for nautical charting.

The highest tidal level which can be predicted to occur under average meteorological conditions and under any combination of astronomical conditions.