1. A surgical navigation system, comprising: a head support portion operable to support at least a head of a patient; a first coil positioned within the head support portion and operable to generate a first field encompassing a volume relative to the patient; an alignment device including a base operable to be connected directly to the head of the patient; a second coil integrated into the base of the alignment device, wherein the second coil is operable to sense the first field produced by the first coil; and an instrument including a third coil; wherein the second coil integrated into the base is operable to cooperate with the third coil to determine a position of the instrument.