A Dalek Deep Space Battle Cruiser was used by the Daleks used in their attack on Omegon. It was destroyed by Mark Seven using a crantinium bomb the Daleks intended to use against the ADF and the colonists of Omegon. Remembering that Crantinium was magnetic, Mark Seven propelled the bomb it into space to attach to the hull of the nearby Dalek Deep Space Battle Cruiser. Once magnetised to the hull, the crantinium-hulled bomb exploded, wiping out the Dalek presence in that planetary system. (PROSE: Exterminate! Exterminate! Exterminate!)
Davros tried to escape Skaro during the Dalek-Movellan War, but a deep space cruiser was six hours away and since it would be too late, he planned to destroy the Movellan ship. (TV: Destiny of the Daleks)