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San Diego Bay is one of the great natural harbors of the world. 

 Four cities and three naval military facilities line its shore- 

 line: the City of San Diego in the north, east, and south; 

 National City and Chula Vista on the eastern shore south of San 

 Diego; Coronado along the western edge of the Bay; North Island 

 Naval Station occupying the western half of North Island; the 

 Marine Corps Depot across the Bay to the north; and San Diego 

 Naval Station along the northeastern shore of the Bay. The City 

 of Imperial Beach lies just south of the Bay on the Pacific coast. 

 Three miles north of San Diego Bay and on the coast is Mission Bay. 

 Twenty-two years ago, Mission Bay was a tidal mud flat. Extensive 

 development, which is still continuing, has converted it into an 

 attractive recreational waterland. 



Approximately 369,000 civilians are gainfully employed in San 

 Diego County. The County's economy, which once depended primarily 

 on the military and the aircraft-aerospace industries, has 

 experienced considerable diversification. Today, other major 

 contributors to the economy are shipbuilding, manufacturing, 

 tourism, education, agriculture, and construction. 



Government agencies comprise the largest civilian employment 

 category in San Diego County. In 1967, 83,500 persons were in 



