Actions that have a good chance of destroying a TARDIS or its crew are automatically prevented by the Banshee Circuits. This function can be overridden at the crew's own risk using the Automatic Systems Override. This large switch is located behind a wall roundel near the Secondary Control Room. While manual override is enabled the operator will find the TARDIS easier to control if it is in hover mode. The operator should also avoid reversing the polarity of the neutron flow. Override mode significantly increases the chances of a misjump.