Submarine positioner system

Claim 1

A SUBMARINE POSITIONING SYSTEM IN RELATION TO A TRIGGERED MINE TARGET COMPRISING A SERIES OF BUOYS SPACED ALONG A PREDETERMINED SUBSTANTIALLY LINEAR PATH INCLUSIVE OF THE TARGET POSITION, SAID BUOYS BEING PLANTED ALONG EQUALLY SPACED POSITIONS AND AT A PRESET HEIGHT ABOVE THE TARGET AREA BOTTOM TO CONSTITUTE A KNOWN REFERENCE TARGET PATH INCLUSIVE OF THE MINE, A SUBMERGED REFLECTOR SECURED TO EACH OF SAID BUOYS AND ORIENTED TO REFLECT INCIDENT LIGHT BEAMS FROM A SUBMERGED SUBMARINE ALONG A COURSE ON ONE SIDE OF THE TARGET PATH, SAID REFLECTORS BEING IDENTICAL TO ONE ANOTHER AND BEING OF THE RETROREFLECTOR TYPE CAPBEL OF REFLECTING AN INCIDENT BEAM FROM THE SUBMARINE DIRECTLY BACK THERETO OVER A RELATIVELY WIDE RANGE OF ANGULAR INCIDENCE OF THE BEAM ON THE REFLECTORS, WHEREBY ACCURATE POSITION FIXES ARE PROVIDED FOR THE NAVIGATING SUBMARINE RELATIVE TO THE TARGET MINE ALONG A COURSE OF KNOWN DISTANCE FROM AND PARALLEL TO THE SAID TARGET PATH THROUGH SIMULTANEOUS BEAM SIGHTINGS ON TWO ADJACENT REFLECTORS.