Technology & Combat Characteristics
A simplified, mass production version of the GAT-X255 Forbidden Blue. Unlike the original design which had the disadvantage of being crushed in deep waters if the "Geschmeidig Panzer" system malfunctions, the GAT-706S Deep Forbidden features an additional reinforced titanium armor around the cockpit, ensuring the pilot's survival if the system fails. Weapons wise, the Deep Forbidden shares many similarities with Forbidden Blue, although some weapons were removed. Its armament consists of a phonon maser cannon, two supercavitating torpedo canister pods, four retractable heavy scythes and a handheld trident. Deep Forbidden also retains Forbidden Blue's high-speed assault form and tail extension, and has option latches on its forearms for equipping additional equipment.
History
One of the second GAT-X series units fielded by the Earth Alliance in C.E. 71 was the GAT-X252 Forbidden Gundam, which was equipped with the "Geschmeidig Panzer" energy deflection armor to deflect incoming beam attacks. Since this system was also ideal as an underwater propulsion system, a new series of underwater mobile suits was created by Alliance to counter ZAFT's underwater mobile suits. The first of these suits was the prototype GAT-X255 Forbidden Blue, but it had a fatal flaw and this was corrected in the mass production-type Deep Forbidden.
The Deep Forbidden was deployed by the Earth Alliance in the final months of the First Alliance-PLANT War and was used against ZAFT forces in the Second Battle of Casablanca. After the war, the EA deployed several Deep Forbiddens against the United States of South America during its war for independence.
By the Second Alliance-PLANT War, the Deep Forbidden was succeeded by the GAT-707E Forbidden Vortex, which was an improved version of the Forbidden Blue.