On Skaro several styles of hoverbout were used to patrol the planet and the monitor events close to spacecraft. (COMIC: Legacy of Yesteryear) The Daleks made use of transolar discs for patrol during the 22nd century Dalek invasion of Earth. (AUDIO: Masters of Earth) A Dalek assassination squad sent in a Dalek time machine to kill the First Doctor and his companions used hoverbouts to obtain a better view of the Aridian desert. (PROSE: The Chase) Transolar discs were salvaged during a war between Daleks and humans and were investigated at Station 7. (COMIC: The Only Good Dalek)