What is a area of deep water forming a shelter where ships can anchor safely?

An area of deep water forming a shelter where ships can anchor safely is called a "harbor" or "port." Harbors provide protection from rough waters, winds, and waves, allowing vessels to dock securely. They are often equipped with facilities for loading and unloading cargo, as well as services for the maintenance of ships. Examples include natural harbors, like San Francisco Bay, and artificial harbors, such as the Port of Rotterdam.