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Is this a method of GD&T simultaneous referencing?
Not sure how to interpret this. (see what is in green oval)
At first I thought it was wrong.
That possibly datum -c- should be by itself with its own FCF using just datums A & B, and then the other three holes with a feature control frame referencing back to A, B & C.
But then someone told me that was legal because it was using simultaneous reference positioning.
However, after reading up on simultaneous referencing, I'm not sure.
See attached print