The bridge is slung underneath one of the forward sections and eight docking bays are distributed throughout the ship. Halcyon-class cruisers are composed of five hexagonal and octagonal sections mounted onto each other.

Despite the disadvantages of the original design, the heavily modified UNSC Pillar of Autumn proved to be one of the most effective, and costly, ships deployed in the war. They were replaced by the Marathon-class cruiser. Their service lives were short due to a unique hull design that was costly to construct and maintain with low maneuverability, poor armament, and concerns about their tactical viability. Robert McLees before 2507, with a hull classification symbol of C.

The Halcyon-class light cruiser, known as the Human Attack Ship class C-II by the Covenant, is a United Nations Space Command cruiser starship classification designed by Dr. Given those odds, I'm content with three.make that four kills.' - Cortana during the Battle of Installation 04. ' A dozen Covenant superior battleships against a single Halcyon-class cruiser. Titanium-A battle plate resistant to around 5 plasma bolts.