Probably the most well known vessel. The Klingon Bird OF Prey, actually B'Rel class has been in service for well over 100 years. It is a very fast and maneuverable vessel, and is also equiped with a cloaking device. Its armaments include 2 disruptor cannons and 1 forward torpedo tube.

The K'Vort Class is a B'Rel class variant, much bigger in size. It is more powerfull and carries 1500+ crew. It is armed with 4 disruptor cannons and 2 disruptor tubes. As like all Klingon ships, these ships are equiped with a cloak.

The Vorcha class Klingon attack cruiser. It is a relativly new design and was heavily used in the Dominion War. It is comperable in size to the Akira Class vessel. It is equiped with a cloaking device and possesses 8 disruptor cannons, 1 large forward disruptor and 3 torpedo launchers.

The K'Tinga class is a very old design, but has served the Empire well. It was used in the Dominion War but because of its age and obsolete weapons it did not do particularly well, especialy on there own. It has a cloaking device and is armed with 6 disruptors and 2 torpedo launchers.

The NeghVar class, the flagship of the Klingon Defence Fleet. Used in the Dominion war this is one of the most heavily armed ships known. It possesses a cloaking device aswell as 20 disruptor cannons, a large forward disruptor and 4 torpedo launchers. Its crew compliment is 2500.