Its canon (ish). The Yeager class was never named, nor seen in action. It was however regularly seen in stock footage in orbit around DS9 during the Dominion War...
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DanG.
"Hi, I'm Commander Troy McClure, you might remember me from other academy training holo-simulations as, Abandon Ship, the quickest way out, and I sense danger, 101 things you dont need a Betazoid to know..."