Yes. my base port is Oakland. This is an Ericsson 27 I bough for teach my son how's sail.Looks like a prior owner put in a fixed port light there to let in some more light.
If you want an opening port, you would have to somehow find a way to fit one on a curved surface, and it's difficult to do that.
Maybe someone can imagine a solution. (?)
Do you sail out of the Alameda estuary? We bought our used boat in Ballena Bay, in the 90's, and trucked it home to PDX. What a wonderful sailing area!!