Thanks for the link. I downloaded the Nederland ENCs, and went to the location you mentioned.
At each point where a "clr 0.0" text is shown, there is indeed a bridge object with "zero" clearance.
There is not too much OpenCPN can do about this, The attribute "clr 0.0" is encoded in the ENC
by the cartographers. We do not want to allow OpenCPN to "edit" this data in any way. We can and should show the cartographer's instructions verbatim. There is potentially useful information in the assertion that there is an impassible bridge in a particular location. Not even a canoe could pass.....
It would be possible to edit chartsymbols.xml, to remove the bridge clearance report from ALL
bridges. I don't think we want that in general, but maybe you do for your own use.