Test of Underwater Reception of Low Frequency Radio Signals Open PDF Document Details Document Type Technical Report Publication Date Apr 01, 1941 Accession Number AD0219603 Entities People F. C. Isely Organizations United States Naval Research Laboratory Tags Communities of Interest Ground and Sea Platforms DTIC Thesaurus Topics Attenuation Bays Chesapeake Bay Couplings Frequency Impedance Materials Military Research Naval Operations Navy Oceans Periscopes Radio Frequency Salt Water Signal Generators Test Equipment Water