Great-Class?

Hey Guys,
I was wondering, what is the Great-Class Heavy Cruiser? It got mentioned in some index in a ADB PDF, and other than it being presumably older, and based around an interesting naming pattern, and being a fairly generic Cruiser of the era, there's little.

If there is no scenario or image, even an SSD for it, me or any of you could design one, how about that?

Great White Shark

Perhaps it was a typo? There is the "Great White" heavy cruiser of the WYN's new construction. YIS date of Y184.