GD&T Position to a Centerline (wince 😬) Datum

[[Je...]]

Hello.  Suppose you were required to measure the position characteristic on this print.  The print uses the centerline as a Datum, which is a no-no.  However, it "appears" the intention is that a line constructed from the center of the two internal holes is Datum A.

Also:

1. There is no diameter symbol in the feature control frame, so no cylindrical tolerance zone is overtly specified.

2. The print does not contain basic dimensions

Question:  Does this position characteristic only control deviation in one axis, which is perpendicular to the Datum A line, or does it control deviation in two axis (presumably in rectangular tolerance zone due to no diameter symbol)?






Thoughts??

.

[[Th...]]

I would think it can only control the single perpendicular axis. There's nowhere along the line that acts as a point to define the horizontal, so you can't define a tolerance zone along that axis in reference to anything.

[[Ma...]]

That's such bad drawing that it can pop somewhere 🤣

Bad thing is, there is no definition of base A ( does it came from holes, outer radiuses, symmetry of sides ).
Since there is no besic dimensions I would argue there is two possible callouts: concentricity to holes or perpendicularity to face.

And one good point - rectangle tolerance zone is correct.
This drawing would make us send additional questions to customer, or send our corrected version.