Some operators who have a very close relationship with their TARDIS have been known to enable Autonomous Control which allows the ship to select its own Space-Time Coordinates and input them into the Directional Unit. This might be done ensure that the ship will materialize near what he is looking for (say a missing companion).

If a TARDIS's Options Analysis Switching Loops become clogged with partially rejected parallels the TARDIS will effectively have Autonomous Control regardless of the operator's wishes. This might result in a TARDIS constantly taking the operator to time zones where the Time Lord's skills and abilities are needed most.