D7 Cruiser

Originally a Klingon design, the D7 Cruisers were sold as budget ships to the Romulans in exchange for Cloaking technology in the mid 2260s. Although contemporaneous with the Constitution Class, the larger ships had more capacity for refits and were more generally capable than the smaller D7. The D7 also fared poorly in comparison to the expensive but effective Bird-of-prey class used by the Romulans, although the latter had the cost of two D7s. Refits to the class were primarily limited to the installation of Third Generation cloaking devices and improved automation cutting the crew down from 430 to 300, and they were perpetually overdue for maintenance and otherwise neglected.

The D7 was ill-suited for front-line work during the Biophage Crisis and fared even worse during the Klingon-Romulan war from 2315-2322. By the end of the war, only one D7 remained in service, a relic of a departing age.