Notes: The K'T'Inga class battlecruiser was fielded during the 2260's. The first active design was the D-7. The Klingon intelligence service had learned in 2263 that Starfleet was engaged in a major refit of Miranda and Constitution classes  which would, among other things, equip them with the latest weapon and propulsion technology. The prospect of these ships becoming significantly more powerful was not one the Klingons welcomed.

The first of the K'T'Inga class was launched in 2262. In 2271 a large energy cloud penetrating Klingon space. Three K'T'Ingas were dispatched to investigate, but as soon as they intercepted the cloud all three were destroyed. This loss three of the Empire's best battlecruisers in minutes threw the high command into a near panic. When the USS Enterprise apparently succeeded in destroying the intruder, the Klingons concluded that the new Constitution design was far more powerful than they had assumed and began planning a new class of ship which would become the Vor'Cha.

The K'T'Ingas have continued in service to the present day, having received the normal upgrades and refits over the years. They are now considered as second line units, and are generally to be found patrolling friendly borders such as that with the Federation, general exploration, or acting in support of the Vor'Cha class attack cruiser.