Navigational apparatus

Claim 1

A NAVIGATIONAL APPARATUS FOR USE IN A PILOTED CRAFT COMPRISING, A FRAME, A LIGHT PROJECTOR MOUNTED AT ONE END OF SAID FRAME, A DISPLAY SCREEN MOUNTED AT THE OTHER END OF SAID FRAME IN THE PROJECTOR LIGHT PATH, A FILM TRANSPORT HAVING BACK AND FORTH MOVEMENT IN A FIRST DIRECTION AND A LIGHT PASSING APERTURE THERETHROUGH, MEANS MOUNTING SAID FILM TRANSPORT TO SAID FRAME BETWEEN SAID PROJECTTOR AND SAID SCREEN AT RIGHT ANGLES TO SAID LIGHT PATH POSITIONED WITH SAID LIGHT PATH PASSING THROUG HSAID APERTURE, A FILM STRIP HOLDER CARRIED BY SAID FILM TRANSPORT AND INCLUDING A FILM STRIP DRIVING SPROCKET HAVING AN AXIS PARALLEL TO SAID FIRST DIRECTION AND BEING ROTATABLE ON SAID AXIS FOR MOVING A FILM STRIP IN A SECOND DIRECTION AT RIGHT ANGLES TO SAID FIRST DIRECTION, A FIRST DRIVE MEANS MOUNTED BY SAID MEANS MOUNTING SAID FILM TRANSPORT AND CONNECTED TO SAID FILM TRANSPORT, SAID FIRST DRIVE MEANS BEING RESPONSIVE TO A SIGNAL CORRESPONDING TO A COMPONENT OF MOVEMENT OF SAID CRAFT IN A DIRECTION RELATED TO SAID FIRST DIRECTION FOR DRIVING SAID FILM TRANSPORT, A SECOND DRIVE MEANS MOUNTED TO SAID FILM TRANSPORT AND CONNECTED TO SAID FILM STRIP DRIVING SPROCKET AND BEING RESPONSIVE TO A SIGNAL CORRESPONDING TO A COMPONENT OF MOVEMENT OF SAID CRAFT IN A DIRECTION RELATED TO SAID SECOND DIRECTION FOR DRIVING SAID FILM SPROCKET, A FIRST AND SECOND SWITCH MOUNTED BY SAID MEANS MOUNTING SAID FILM TRANSPORT AND OPERABLE UPON MOVEMENT OF SAID FILM TRANSPORT IN THE FIRST DIRECTION TO A FORWARD LIMITT AND A BACKWARD LIMIT RESPECTIVELY, MEANS ACTUATED BY SAID FIRST SWITCH ENERGIZING THE SAID FIRST DRIVE FOR A PREDETERMINED MOVEMENT AT AN ACCELERATED RATE, AND MEANS ACTUATED BY SAID FIRST SWITCH ENERGIZING SAID SECOND DRIVE FOR A PREDTERMINED MOVEMENT AT AN ACCELERATED RATE.