Show electric cable will guide ship in fog A device that would enable a blindfolded helmsman to steer a ship safety safely into harbor was deserved described at the annual meeting of the amerlean american institute of electrical engineers by robert 11 II marriott consulting engineer of the federal radio commission an electric cable lying on the sea bottom Is the guide two colls coils of wire are hung over each side of the vessel they pick up electric impulses in the cable by induction and transmit them as sounds through headphones worn by the helmsman when the keel Is over the cable the intensity of sound la Is equal in each ear but when the sound volume begins gilsto to diminish in one ear car it Is tin an indication di that the ship Is slipping on off its course in the direction of the faint sound side fog toes docs not affect the operation of the cable |