A high-performance ship that has both sufficient mobile suit operation capability and high firepower, the Ra Cailum-class has five two-barrel main beam turrets, twenty-two anti-aircraft guns, and six missile launchers. It also has eight engines and a pair of cooling fins to help improve fuel consumption and increase speed. It has two bridges, a regular bridge and a combat bridge that also serves as an escape pod. It has a catapult for launching mobile suits on each side of the ship, and a deck for landing at the rear.
A refit variant exist in U.C. 120, it is called the Admiral Tianem. While the exact changes to the ship are not fully known, a few notable differences included the launch catapults mounted sideways, the removal of a twin mega particle gun and several anti-aircraft guns, and a few changes in the hull. The Ra Cailum-class remained in service even by U.C. 150s, and has undergone modernizations and upgrades such as equipping the bow with a beam shield have been carried out.
n U.C. 0093, the name ship of the Ra Cailum class served as the flagship of the Londo Bell task force. Commanded by Captain Bright Noa, the ship played a major role in the Second Neo Zeon War, by first rescuing a disabled civilian shuttle, then launching a nuclear barrage against the asteroid Axis, and lastly by deploying a team of mini mobile suits to infiltrate and destroy Axis from the inside.
In U.C. 0096, during the Laplace Incident, the Ra Cailum responded to an assault on Dakar by Zeon Remnants and launched the Tri-Stars Team to intercept. However, the attack was merely a diversion to distract the Federation from locating the Garencieres in the desert. Later, the Ra Cailum gained a new addition to the crew: Riddhe Marcenas and his MSN-001A1 Delta Plus before moving to intercept a Zeon attack at Torrington.