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Show Electric Cable Will Guide Ship in Fog "A device that would enable a blindfolded blind-folded helmsman to nteer a ship safely Into harbor was described at the an ! mini meeting of the American Instl- tute of Eleetrlcul F.nglneers by Robert . II. Marriott, consulting engineer of the federal radio commission. An electric cnble lying on the sea bottom Is the guide. Two colls of wire are hung over each side of the vessel. They pick up electric Impulses Im-pulses In the cable by Induction and transmit them aa sounds through bead phones worn by the helmsman. When the keel Is over the cable, ' the intensity of sound Is equal In each ear. But when the sound volume begins be-gins to diminish In one ear It Is an Indication In-dication that the ship Is slipping off Its course In the direction of the faint, sound side. Fog does not affect the , operation of the cable. , |