Which term refers to coastal waters, ports, and harbors?

The term that refers to coastal waters, ports, and harbors is "Green Water." This designation is used to describe the areas of water that are closer to the land and are generally shallower than deeper ocean waters. Green Water locations are significant for various maritime activities, including shipping, fishing, and recreational boating, as they are more accessible and often have more infrastructure compared to deeper waters.

In contrast, "Blue Water" typically refers to the open ocean or deep-water areas that are far from land, where navigation and operations are more complex due to greater depths and distance from shore. "High Seas" denotes waters that are beyond national jurisdiction, which can include both deep and shallow areas, but is not specific to coastal zones. "Shallow Waters" describes a depth characteristic rather than a specific geographic classification and doesn't encompass the full context of coastal areas or infrastructure typically found in ports and harbors.