The B'rel-class (also known as the K22B-class) was a type of Klingonbird-of-prey scout starship in Imperial Defense Force service in the 23rd century. By the 24th century, these vessels were considered surplus, and were often sold or traded to other powers.
They were classified as a class 1 vessel.
The B’rel class, first developed in 2270, is the second known Bird-of-Prey operated by the Klingon Empire, it builds directly on the successful design on the earlier Birds-of-Prey but includes ideas and technology taken from Romulan designs obtained in the short lived Klingon-Romulan alliance of the 23rd century, most notably a cloaking device
The B'rel class not only remained in service well into the 24th century but also inspired a larger variation, the K'vort class.
The B'rel class bird-of-prey features adjustable wings, which can take on different positions to optimize the class for battle, warp speed, atmospheric flight and even landing
In 2293 one B'rel class ship, the IKS Dakronh, was modified to fire its weaponry while cloaked. Despite its advantages, this vessel was destroyed after only a few months of operation.
Another feature present in recent versions of these craft, which may not be standard, was the introduction of Gravity mines that would latch on to and slow down enemy ships.