"I agree with you on ANSI, but I'm not so sure about the RSTC. I have
been under the impression that members of the RSTC agree to meet their
standards, and that is the basis for different C cards being accepted
everywhere."

They agree that their standards for the open water class (only) will
meet or exceed the RSTC adopted standards. I don't know of any agency
that has accepted the RSTC standards as written. Different agencies
have differing points of view about various topics and those points of
view are reflected in their individual standards. All standards that
I've looked at have strong points and weak points when compared to
other standards. Standards from different agencies vary much more than
you might think, but getting back to the original question, there is
virtually no difference in the recognition of c-cards issued by
different agencies.

Walter


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