As the General War dragged on, every empire sought ways to improve the firepower and survivability of their ships. The Gorns, with a history of efficient and innovative designs, found a relatively simple way to accomplish this. They divided the two bubbles of a battlecruiser across the widest part and inserted a straight hull section with additional power, systems and weapons. This required some internal modifications but was more efficient than building new ships. The Klingons could not convert a D7 into a C7 and the Federation could not convert a heavy cruiser into a battlecruiser but the Gorns could and did convert many battlecruisers into heavy battlecruisers.
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