A modifier that indicates shoreline delineated in a regular, sufficiently controlled survey of any date. Shoreline features with no accuracy modifier should be considered Accurate

or Estimated

The outer limit line of a vegetation area, such as marsh or mangrove, delineated as shoreline; the shoreline as it would appear to the mariner. (5)

A modifier that indicates shoreline which does not meet the definition of Accurate

An embankment or wall for protection against waves or tidal action along a shore or water front. (6)

An artificial waterway with no flow, or a controlled flow, used for navigation, or for draining or irrigating land. (6)

An artificial basin fitted with a gate or caisson, into which vessels can be floated and the water pumped out to expose the vessel's bottom. Also called graving dock. (5)

A modifier that indicates shoreline which is generally considered to be outside of 100 feet (30.5 meters) of its correct geographic location .

The Great Lakes, and other small and large bodies of water entirely surrounded by land, both natural and artificial. (6)

A wet dock in a waterway, permitting a ship to pass from one level to another. (5)