Patent ID: 8744763

Claim:
A navigation system comprising: a host unit having: a positioning device that determines at least one of a first absolute position and a first absolute orientation of the host unit; a first communication device that communicates signals; a first processor; and a first memory; a remote unit having: a second communication device that receives the signals from the first communication device; a second processor; and a second memory; wherein at least one of the first processor and the second processor compares first aspects of a known pattern with second aspects of an image of a captured pattern positioned on a surface at at least one of the host unit and the remote unit; wherein at least one of the first processor and the second processor determines at least one of a relative position and a relative orientation of the remote unit relative to the host unit based on the comparison of the first aspects and the second aspects; wherein at least one of the first processor and the second processor determines at least one of: a second absolute position of the remote unit based on the first absolute position and the relative position; and a second absolute orientation of the remote unit based on the first absolute orientation and the relative orientation; and wherein the signals include data selected from the group consisting of the first absolute position, the first absolute orientation, the relative position, the relative orientation, the second absolute position, and the second absolute orientation, wherein the data is communicated from the host unit to the remote unit using the first communication device and the second communication device.