Artdessei (アートデッセイ Atodessei) is a space-flight-capable carrier and battleship owned and operated by GUTS in the Ultraman Tiga series. After 20 years of secret construction led by Dr. Naban Yao, it made its first appearance in episode 19. It is large enough to load 3 GUTS Wings. Aside from standard laser beam cannon armament, it is also equipped with the Deluc Cannon (デラック砲 Derakku-hō) that attached to the Maxima engine power source
The ship employs a high-power laser generator called Maxima Overdrive, which played a role in a battle against Gobnu armies. Usually stored in F4 dock located in the bottom of the base, Artdessei needs to be lifted until it can sortie from the elevator gate. Since the development was underway in utmost secrecy, even the member of GUTS were unaware of the project at first. When Zoiger covered the whole Earth and Dive Hangar went under attack, the crew were forced to take shelter in the ship.
In episode 32, this ship is seen combining with Lovemos, with its hull forming the central body of the monster.
In Ultraman Dyna episode 42, Asuka dreams that the Artdessei was modified into a pirate ship-esque design called Space Pirate Ship Akebonomaru (宇宙海賊船 曙丸 Uchū kaizoku-sen Akebonomaru lit. Dawn Circle), commanded by Captain Munakata and his pirate crew to battle Captain Zoyaka.
- The battleship itself is modeled after a whale and an Imperial-class Star Destroyer from the Star Wars franchise.
- The Akebonomaru is a homage to the Arcadia from the Space Pirate Captain Harlock franchise.
- The skull on the bow of the Akebonomaru is sculpted after the head design of Ultraman Tiga.