A Klingon mobile battle base was an offensive military vessel designed by the Klingon Empire in the late 23rd century. Intended to support Klingon expansion into new territories without the need for ground-based outposts, the mobile base measured 3050 meters long, with a mass of 30 million metric tonnes. It was able to travel at Warp 5, could carry thirty Birds-of-Prey, and was armed with fifty double-barreled phaser banks.