Defence Force Field Prisms
The Defence Force Field Prisms are created by the Force Field Generator (see illustration) located in the console's stem. Without them the shock transferred from even minor collisions can cause serious damage to the Interior of the TARDIS. The can be operated manually but can also be set up to be triggered automatically by the HADS. When activated, these gravimetric shields surround a TARDIS and protect against almost any electro-magnetic radiation, physical, electrical discharge, sonic, magnetic, gravitic, psionic, and chronon forces. It can even deflect the blast from a starship's planetary bombardment missile. A TARDIS can withstand the destruction of a planet and the surface of a quasar or a neutron star. The heart of a star does produce enough heat to instantly vaporize the capsule. Any biological life that touches the Force Field will be repelled with a power electric shock. Attempts to paint a TARDIS with active force-fields will fail, as the paint will simply fall off. While the Force-Fields do not completely prevent the use of a TARDIS's communications systems, operators will sometimes find it necessary to deactivate them when sending complex telepathic messages. When operating in space there is a first and second line of defensive fields. The first is projected some distance away, the other is much closer to the exterior of the exo-shell.
The Force-Field Generator is found within the Stem of the Master Control Console. Even when the field has not been raised it is still operation, creating a very small force-field within and above it. Any small object that was to be placed there when the shields were 'raised' would become trapped in that area when the shields were dropped again. Operators should be aware Force Barriers are not standard equipment for Mark I TARDISes. The Force-Field system can be slaved to be activated by the HADS.
The Gravitic Anomaliser, shields a TARDIS from gravitic forces and can protect it from the gravity of a neutron star. In an emergency the Gravitic Anomaliser can be used as a dimensional stabilizer if the main stabilizer is fused.
The default settings for the force field can be programmed to allow the Main Doors to be safely opened even when the TARDIS is in space. The main Force Field can also act to filter the air if the Main Doors are open. However these fields must be switched off for anyone to exit or enter the TARDIS. Since the Defence Fields for the Main Doors are on a separate circuit it is possible to enter or exit a TARDIS while all parts of the Exo-Shell (except the Doors) are protected. With some difficulty, the field for the doors can be extended beyond a TARDIS's Exo-Shell. This can be used to create a pressurized air shell or corridor with a range of about 10 meters. The force fields can also be reconfigured to generate null-gravity zones around the outside of the TARDIS. The Forcefield can be used to nudge the TARDIS from place to place. If the TARDIS is properly located, Force Fields can also be reprogrammed to serve as an energy field that will block sunlight over a very large area, replicating the effects of a solar eclipse. It can only manage this feat for a handful of seconds however.
The Force Fields cannot be penetrated by transmat beams unless the beam's power has been increased by a factor of 50 million beyond normal intensity. It would take a psionic force of tremendous (almost unbelievable) power to penetrate a TARDIS travelling the vortex. Beings such as the Guardians, Eternals, Sutekh, and higher life forms can penetrate a TARDIS's Force-Field Prisms by rotating the frequency of their attacks. Such an attack might cause the relative continuum stabilizer to fail, leading to a major power loss. A beam of Coherent Tunnelled Chronons is also capable of damaging a TARDIS, as is a black hole, Dalek Temporal Disruptors, a supernova, the D-Mat Gun, or a wormhole. Time displacement waves found near a black hole can penetrate the force fields and kill the crew (though the TARDIS will be undamaged).
(See also Vortex Shields)
The following color code is used:
- Black: For information from the TV Series, including Dimensions in Time, and 1996 TV Movie.
- Blue: For information from the Novels and Audios including Target, Virgin, BCC, and Big Finish.
- Green: For information from 'licensed' reference sources such as the Technical Manual, Doctor Who Magazine, and the Role Playing Games.
- Red: For information from unofficial sources -The Faction Paradox series, behind the scenes interviews, author's speculation, and popular fan belief.
The TARDIS Technical Index is copyright Will B Swift.