Show U. U S. S Boat Anti Anti Anti- Boat U-Boat Super Snooper Super Snooper A and t S 'S St I 1 j ji ay S i II x I i U a A fr t i tf rua N rw w N. N A AOne l One of the many ingenious inventions that overcame the boat U-boat wolf packs the expendable radio sono buoy The sono buoy was a sort of super snooper radio device dropped from planes The picks up the sound thrown off oft by the boats U-boats and relays it by cable to the radio transmitter in the top compartment which broadcasts the signal to waiting ships and planes |