A device for a surgical navigation system, comprising: a connection unit, wherein the connection unit comprises an articulated arm, and wherein the articulated arm comprises: a first arm extension having a first end and a second end; a second arm extension having a first end and a second end; a first joint connection between the first end of the first arm extension and the first end of the second arm extension, thereby connecting the first arm extension to the second arm extension; a second joint connection disposed at the second end of the first arm extension; and a third joint connection disposed at the second end of the second arm extension, wherein the first joint connection is a rotary joint, the second joint connection is a ball joint, and the third joint connection is a ball joint); a marker carrier unit removably attached to the connection unit; an attachment unit connected to the connection unit for fixing the device to a body part of a patient, wherein the marker carrier unit comprises an attachment area for removably attaching the marker carrier unit to the connection unit, and the connection unit further comprising an attachment mechanism configured at the second end of the first arm extension and configured to couple to the attachment area of the marker carrier unit, wherein the attachment mechanism comprises an attachment foot, and the attachment foot is connected to the second joint connection wherein the second joint connection permits the marker carrier unit in mated connection with the attachment foot to be rotated and pivoted relative to the connection unit, wherein the marker carrier unit comprises an alignment mechanism in connection with the attachment foot to position and orient the marker carrier unit relative to the connection unit, wherein the attachment foot comprises receiving areas corresponding to the alignment mechanism of the marker carrier unit, wherein the alignment mechanism and receiving areas cooperate to align the marker carrier unit in connection with the attachment foot to position and orient the marker carrier unit relative to the connection unit, and further comprising a clamp lever secured to a surface of the marker carrier unit and disposed near a position of the attachment area, wherein the clamp lever pivots to engage and lock the attachment foot within the attachment area of the marker carrier unit thereby providing a secure connection to position and orient the marker carrier unit. a connection unit, wherein the connection unit comprises an articulated arm, and wherein the articulated arm comprises: a first arm extension having a first end and a second end; a second arm extension having a first end and a second end; a first joint connection between the first end of the first arm extension and the first end of the second arm extension, thereby connecting the first arm extension to the second arm extension; a second joint connection disposed at the second end of the first arm extension; and a third joint connection disposed at the second end of the second arm extension, a first arm extension having a first end and a second end; a second arm extension having a first end and a second end; a first joint connection between the first end of the first arm extension and the first end of the second arm extension, thereby connecting the first arm extension to the second arm extension; a second joint connection disposed at the second end of the first arm extension; and a third joint connection disposed at the second end of the second arm extension, wherein the first joint connection is a rotary joint, the second joint connection is a ball joint, and the third joint connection is a ball joint); a marker carrier unit removably attached to the connection unit; an attachment unit connected to the connection unit for fixing the device to a body part of a patient, wherein the marker carrier unit comprises an attachment area for removably attaching the marker carrier unit to the connection unit, and the connection unit further comprising an attachment mechanism configured at the second end of the first arm extension and configured to couple to the attachment area of the marker carrier unit, wherein the attachment mechanism comprises an attachment foot, and the attachment foot is connected to the second joint connection wherein the second joint connection permits the marker carrier unit in mated connection with the attachment foot to be rotated and pivoted relative to the connection unit, wherein the marker carrier unit comprises an alignment mechanism in connection with the attachment foot to position and orient the marker carrier unit relative to the connection unit, wherein the attachment foot comprises receiving areas corresponding to the alignment mechanism of the marker carrier unit, wherein the alignment mechanism and receiving areas cooperate to align the marker carrier unit in connection with the attachment foot to position and orient the marker carrier unit relative to the connection unit, and further comprising a clamp lever secured to a surface of the marker carrier unit and disposed near a position of the attachment area, wherein the clamp lever pivots to engage and lock the attachment foot within the attachment area of the marker carrier unit thereby providing a secure connection to position and orient the marker carrier unit.