Transportation
The Bay Area is a large natural harbor. Around it have grown seaports and naval facilities. Active ports include the ports of Richmond, Redwood City, San Francisco, and Oakland. Ships also traverse the bay heading to and from ports in Stockton and Sacramento. During World War I and World War II the region was the United States's major shipbuiding center for the Pacific. Former naval facilities include Point Molate Naval Refueling Depot, Alameda Point Naval Facility and Mare Island Naval Shipyard.
Many Bay Area cites have marinas, including Berkeley, Petaluma, and Redwood City.
There is also an extensive commuter ferry system, which is being expanded by the San Francisco Bay Water Transit Authority.
Oceanic harbors have been built at Bodega Bay and Half Moon Bay.
Read more about this topic: Hydrography Of The San Francisco Bay Area