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Mark_Friedenbach comments on Request for Steelman: Non-correspondence concepts of truth - Less Wrong
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Sorry I'm dense. What does this have to do with anything? It is true that the balloonist is in a hot air balloon 30 feet above a field. These are correct facts. Are you arguing for a concept of truth which would not qualify "Yes, you're in a hot air balloon, about 30 feet above this field" to be a true statement?
I think Lumifer is suggesting that a model can correspond accurately to reality (e.g., representing the fact that X is in a hot air balloon 30 feet above Y's current location) but none the less be useless (e.g., because all X wants to know is how to get to Vladivostok, and knowing he's in a balloon 30 feet above Y doesn't help with that). And that this is an example of how a model can be "bad" other than inaccurate correspondence with reality, which is what you were asking for a few comments upthread.
Indeed they are. That is, actually, the point.
Recall your own question (emphasis mine): "in what ways can a model be useless that differ from it not corresponding to reality?"