Dreadnought battlecruiser

In starship classification, the dreadnought battlecruiser was a type of dreadnought based on battlecruiser classes. In the early 25th century, this designation usually included physically large, powerful starships. This designation referred to dreadnought cruisers of Klingon manufacutre. It included tier 5 and tier 6-rated vessels. 

List of dreadnought battlecruiser classes

 * Klingon D9 Dreadnought Battlecruiser
 * Klingon Empire	Durgath Temporal Heavy Dreadnought Battlecruiser
 * Klingon Empire	Durgath Temporal Heavy Dreadnought Battlecruiser

Variations
Retrieved from the 26th century, the Klingon Defense Force recovered the and its sister ships of the Durgath-class. This prochronistic starship was the only known member of the temporal heavy dreadnought battlecruiser class.