Precisional navigational orientation

Claim 1

APPARATUS FOR OBTAINING A PRECISION FIX FOR A NAVIGABLE CRAFT, WHICH COMPRISES, A CHART HAVING ELECTRICALLY CONDUCTIVE SEGMENTS REPRESENTING CONTOURS OF THE GENERAL AREA OF THE LOCATION OF THE CRAFT, ECHO-CONTROLLED MEANS TO MAKE A RECORD TRACE OF THE ACTUAL DISTANCE OF THE CRAFT FROM A REFLECTING SURFACE OF KNOWN LOCATION, MEANS INCLUDING A DEAD RECKONING INSTRUMENT HAVING A DEAD RECKONING TRACER ELEMENT AND MEANS TO MOVE SAID TRACER ELEMENT IN BOTH COORDINATE DIRECTIONS OVER SAID CHART REPRESENTING SAID CONTOUR AND TO PRODUCE DIGITALIZED SIGNALS CORRESPONDING TO THE INDICATED DISTANCE BETWEEN THE CRAFT AND THE SAID REFLECTING SURFACE AT THE POINT ON SAID CHART INDICATED BY THE SAID TRACER, MEANS TO APPLY SAID DIGITALIZED SIGNALS TO MAKE A RECORD TRACE OF SAID INDICATED DISTANCE AND SUBSTANTIALLY SIMULTANEOUSLY WITH THE FIRST RECORD, AND MEANS TO ADJUST SAID TRACER IN COORDINATE DIRECTIONS TO BRING SAID TRACER ELEMENT INTO A POSITION WITH RESPECT TO SAID CHART REPRESENTATIVE OF THE ACTUAL TRACK OF THE CRAFT.