Show sea collmon collisions minimized the danger of collisions at sea on foggy nights can now be minimized by a new Invent invention lon which shows with luminous spots and arrows on a compass marked screen the location and direction of every ship within a radius of ten miles it Is a cathode ray device which Is operated by the radio signals sent bent out by other ships every twenty seconds pilots watching it know practically by a were mere glance at the chart when and how bow much to change their courses con raes colliers weekly |