| Show sea collisions collision minimized tho the danger of collisions at sea BOA oo on foggy nights can now ie be minimized minimize JI by a new invention which shown with luminous spots spot and arrows on oa I 1 ft compass marked screen the location and direction of every ship within a radius of ten miles it la Is a cathode ray device which to la operated by the radio signals sent out oat by other ships every twenty second sc conda pilots watching it know practically by a mere mer e glance at the chart when aud and how much to change their courses CoIlle colliers rIgg witly |