Freehand surgical instruments and equipment will be navigated

And configured holder to support a portion of the instrument in a safe position, and a guard configured to cover a portion of the instrument, the at least one configured to support a portion of the tracking system One of the mounting portion, the handpiece arranged for instruments having an actuator mounted on the handpiece. The actuator may be configured to control the exposure of the instrument. Surgery device to be navigated, the tracking system, and device for communication with the tracking system is provided to include a platform for communicating with the tracking system and instruments. Platform, which can be read and the processor, via at least one hidden object associated with the treatment being navigated predetermined, in a computer configured to selectively control the shaping of the target in the instrument and computer readable storage media having a program code, it may have. .FIELD 4