Position homing indicator

Claim 1

A NAVIGATIONAL COMPUTER OF THE TYPE WHICH VISUALLY PRESENTS THE INSTANTANEOUS RANGE, ON A VISUAL INDICATOR, AND INSTANTANEOUS BEARING, BY MEANS OF A POINTER, TO A SELECTED GEOGRAPHICAL REFERENCE COMPRISING AN AIR PLOT SUB COMPUTER PROVIDING AN ANALOGUE SIGNAL OF DISTANCE TRAVELLED ALONG THE AIRCRAFT HEADING IN CARTESIAN FORM; A WIND PLOT SUB COMPUTER PROVIDING AN ANALOGUE SIGNAL IN CARTESIAN FORM OF THE ACCUMULATED WIND SPEED AND DIRECTION FOR THE DURATION OF THE AIRCRAFT''S FLIGHT; A COMMAND VECTOR GENERATOR PROVIDING A SIGNAL ANALOGOUS TO THE CARTESIAN COORDINATES OF A SELECTED GEOGRAPHICAL REFERENCE RELATIVE TO A MAP GRID DATUM; MEANS FOR BALANCING THESE THREE ANALOGUES TO PRODUCE AN OUTPUT SIGNAL ANALOGOUS TO THE INSTANTANEOUS VALUE OF THE CARTESIAN COORDINATES OF THE SELECTED GEOGRAPHICAL REFERENCE RELATIVE TO THE AIRCRAFT POSITION; MEANS FOR CONVERTING THE OUTPUT SIGNAL INTO POLAR COORDINATES AND GENERATING ANALOGUES OF INSTANTANEOUS RANGE AND INSTANTANEOUS BEARING OF THE AIRCRAFT RELATIVE TO THE SELECTED GEOGRAPHICAL REFERENCE; DRIVE MEANS FOR UTILIZING THE GENERATED SIGNAL FOR INSTANTANEOUS BEARING TO POSITION THE POINTER; AND DRIVE MEANS TO UTILIZE THE GENERATED SIGNAL OF INSTANTANEOUS RANGE TO POSITION THE VISUAL INDICATOR TO INDICATE THE INSTANTANEOUS RANGE.