Cloaking field

A cloaking field was a device employed to make the user invisible. Several races had access to this technology.

In 1913, the Family of Blood used a cloaking field to hide their ship; it glowed green whenever someone came into contact with it (DW: Human Nature / The Family of Blood)

In 2009, Commander Kaagh of the Tenth Sontaran Battle Fleet used a cloaking field to hide himself and his ship. (SJA: The Last Sontaran)

In 2050, the Korven supersoldier, Trojan, was equipped with a cloak, but was still detectable by K9. (K9TV: The Eclipse of the Korven)

For centuries, a Dalek fleet used a cloaking field to hide from view of the Game Station. (DW: Bad Wolf/ The Parting of the Ways)