Keywords: Soviet intelligence gathering trawler Gidrofon, a photo from aboard USS Lipan (1).jpg USS Lipan chased her all over Yankee Station in the Gulf of Tonkin and South China Sea during the Vietnam era These intelligence gathering trawlers would remain on station for months trying to gather as much information about U S war fighting capabilities The vessel was festooned with antennae 1968 http //web archive org/web/20120301081709/http //usslipan com/Tet_photos2 htm USS Lipan “ collection of photographs http //web archive org/web/20120301085531/http //usslipan com/images/Rich 20Tetrault/File0321 jpg direct link 22px United States Navy United States Navy Rich Tetrault BM2 see http //web archive org/web/20110717181439/http //usslipan com/ PD-USGov-Military-Navy Lymantria <span class signature-talk >talk</span> date 2013 12 3 SIGINT ships of the Soviet Union |