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by lebca 3565 days ago
You're not wrong about the bay being mostly shallow. To clarify though, the bay's average depth in the southern and northern areas is closer to 15-17 ft and near the Golden Gate Bridge and Treasure Island area is closer to 40ft[1]. Maybe the median depth is closer to 7 feet.

[1] http://omp.gso.uri.edu/ompweb/doee/science/descript/baysfran...