These are the vehicles that appeared in the Code Geass universe.
Main article: Caerleon-class
The Caerleon-class Floating Battleship (カールレオン級浮遊航空艦, Kārureon-Kyū Fuyū-Koukūkan) is a line of Britannian light aerial cruisers, also known as "Light Avalons", which commonly serve as escort ships in the Britannian Aerial Armada.
Main article: Logres-class Floating Battleship
The Logres-class Floating Battleship (ログレス級浮遊航空艦 Roguresu-Kyū Fuyū-Koukūkan) is a line of Britannian aerial battleships, noteworthy of their two pairs of large wings.
L'Éclair (レクレール, rekureeru) is Schneizel's flagship, prior to the completion of the Avalon.
The G-1 Base (G-1ベース, Ji-Wan Beesu) is a Britannian landcruiser commonly employed by the known members of the Imperial Family as a mobile command center and a field hospital. Since these mobile bases are almost always carrying someone important, they are always surrounded by motorcades of police, medical vehicles, and escorted by the regular military in the form of tanks, armored vehicles, and Knightmares
The royal family uses a shuttle for personal transportation. Lelouch had a personal shuttle of this kind, and it served him throughout his reign as Emperor. Schneizel also had one of these shuttles on board the Damocles on which he attempted to escape. There are many shuttle types that Brittania utilizes to transport their officers and royals.
The Knightmare VTOL (Vertical Take-Off and Landing) are craft used by the Britannian Military to transport individual Knightmare Frames into battle. These vehicles are very numerous and seem to be controlled from the knightmare it is carrying, rather than having an on-board pilot or crew. These vehicles are used mostly for tactical purposes; whereas the larger aerial battleships like the Caerleon-class and Logres-class are optimized for strategic purposes.
Generally dubbed VTOLs, these aircraft are designed for close support of Britannian ground units. They appear regularly in the anime and manga. Each is armed with a ventral cannon as standard, along with at least two hard-points on the wings, which generally carry rocket pods.
United Federations of Nations models
Longdan (竜胆/龍蛋, Rindou, lit. Gentiana or Dragon Egg) is pyramid-shaped land-cruising mobile fortress controlled by the Chinese Federation, capable of deploying dozens of Gun-Ru Knightmares. It has two large cannons and thirteen normal cannons. Certain models are equipped with tank treads for land mobility, while others have hover systems to levitate across bodies of water.
Da Longdan (大龍蛋) is a mobile fortress belonging to the Chinese Federation and its successor the United States of China. It has a similar design as the Longdan though of a much larger scale. It is also noteworthy for its large bow cannon, which is perhaps the largest conventional gunnery weapon in Code Geass.
Black Knights' Submarine
Prior to giving the Black Knights the Ikaruga, Kyoto provided them with a high-speed submarine, which is simply known as "Black Knights' Submarine" (黒の騎士団潜水艦, Kuro no Kishi-Dan Sensuikan) which served as the Black Knights' base during their time in Area 11. It has torpedo launchers and cruise missile launchers, as well as cargo storage for Knightmares. It also has two Slash Harken-like anchors.