mar del plata argentina/buenos air sound detect monday south atlantic near argentine navy submarine 44 crew go miss five days ago believe come ill-fated vessel navy spokesman say sound detect probe initially raise hop crew members aboard ara san juan submarine disappear report electrical malfunction may intentionally make noise attract rescuers analysis argentine authorities fourth day search-and-rescue mission show highly unlikely come german-built submarine navy spokesman enrique balbi tell reporters buenos air correspond pattern would consistent bang wall morse code balbi say describe whatever detect continuous constant sound disappointment follow another letdown early day navy say satellite call detect weekend fact come vessel tmsnrt.rs/2zq8hgz vessel report electrical problem head back base port mar del plata disappear wednesday navy say storm complicate search efforts relatives wait anxiously dozen boat aircraft argentina unite state britain chile brazil join search effort authorities mainly scan sea sky storm make difficult boat navy say monday night two boat belong french oil company total sa offshore operations argentina arrive patagonian port comodoro rivadavia transport rescue equipment u.s. navy bring country include remote-operated vehicle mini-submarine submarine rescue chamber gabriel galeazzi naval commander tell reporters submarine come depths report unspecified electrical malfunction disappear nearly 300 miles coast submarine surface report malfunction grind command order return naval base mar del plata say malfunction necessarily cause emergency galeazzi add craft navigate normally underwater speed five knot toward mar del plata last hear say warship lot backup systems allow move one another breakdown galeazzi say one crew argentina first female submarine officer eliana maria krawczyk 35 join navy 2004 rise become master-at-arms aboard ara san juan families crew members gather mar del plata naval base await news join monday president mauricio macri continue deploy available national international resources find submarine macri say twitter intermittent satellite communications detect saturday government say likely come submarine ara san juan send last signal wednesday accord balbi call detect correspond satellite phone submarine san juan say monday add craft oxygen seven days say would surface get near surface replenish air supply ara san juan inaugurate 1983 make new three submarine navy fleet build germany undergo maintenance 2008 argentina maintenance include replacement four diesel engines electric propeller engines accord specialist publication jane sentinel sound atlantic miss argentine submarine navy spokesman