In {HEAD ~ view} of {TAIL ~ the foregoing}, it is a primary object of the present invention to provide a system, method, and apparatus for determining relative position underwater 
of
In { HEAD ~ view } of { TAIL ~ the foregoing } , it is a primary object of the present invention to provide a system , method , and apparatus for determining relative position underwater
OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH