Magnetrap

Magnetraps are devices used by the Daleks to pull spacecraft down to a planet by magnetic attraction exerted by the spotlight-like devices on the four corners of the landing pad. When used, a ship can be guided down so gently that a sleeping crew won't awaken before the ship is boarded. (DWA: Monsters of Gurnian)

The Daleks invented this device before their discovery of Earth. (DC: Impasse)

Behind the Scenes
While referred to in-story as a magnetrap, the feature Dalek War Machines in which it first appears refers to it as a magnatrap.