|man_made = breakwater|
|A man-made structure designed to protect a shore or harbour from the sea and waves.|
|Rendering in openstreetmap-carto|
|Group: Man made|
|Used on these elements|
|Status: de facto|
|Tools for this tag|
Use man_made=breakwater to identify breakwaters - man-made structures designed to protect a harbour or section of shore from the sea and waves, often to protect boats in a harbour from the effects of high waves. These may be built using loose large natural boulders, concrete tetrapods, demolition debris or as a solid concrete structure or solid stone structure. They are commonly large enough to have a flat top and may carry a publicly accessible highway=footway or track.
Take care not to confuse these with with man_made=groyne, which are commonly thin structures that are meant to stop loose materials (eg sand) being washed away or moved along the shore or man_made=piers, which are commonly platforms that extend out over water by use of pillars, or by floating primarily used for people to access boats or similar.
How to map
Objects that are used in this context
Breakwaters may also carry man_made=lighthouses or navigation lights. If there is a path along it use highway=footway or similar. If there is a wall along one side of a wider breakwater tag it with barrier=wall. Use mooring=* if boats can tie up alongside and highway=steps for steps leading down to the water.
Approved proposal: Proposed features/Breakwater