An atmospheric floatation device of unknown principle, but probably electromagnetic in nature, capable both of suspending extremely high-mass structures in stationary flight and moving them through the air at decently fast speeds. It requires gyroscopic stabilization. Originally, the immense size of the older Float Systems made it suitable only for enabling the aerial transport of traditional land cruisers, but recent miniaturization efforts have produced Float Units scaled for installation on Knightmare Frames. Another variation of the Float system is the Energy Wing system created by Cécile Croomy. This variation far surpasses the performance of all previous models. A Knightmare equipped with one has unrivaled agility and can break the speed of sound, allowing the pilot move at blinding speeds. It is difficult to control, however, and only the Lancelot Albion and Guren S.E.I.T.E.N. Eight Elements are equipped with them. The Operators of the Float System are mostly the Britannian Armed Forces.
The first float system developed for a knightmare was shown integrated to the prototype, Gawain. The Lancelot was attached with a float system before Battle for Kyushu (episode). Following the success of the float system prototype, the Holy Britannian Empire mass-produces them and is usually seen as standard equipment for their military.