mar del plata argentina storm sunday complicate efforts find argentine navy submarine miss south atlantic 44 crew members satellite call think come vessel help searchers identify vessel location defense ministry say ara san juan appear try make contact seven fail satellite call saturday late morning early afternoon vessel 432 km 268 miles argentina coast location last know early wednesday wave meter 20 feet wind reach 40 knot complicate search sea authorities spend sunday try trace submarine location data satellite call without significant progress navy official tell reporters analyze signal know intermittent weak say gabriel galeazzi naval commander could help determine point map help search u.s. satellite communications company iridium communications inc bring help analyze call say originate device aboard vessel may another satellite communications company equipment say last call detect device wednesday day government say vessel vanish dozen boat aircraft argentina unite state britain chile brazil join effort authorities mainly scan sea storm make search difficult boat navy admiral gabriel gonzalez tell reporters unfortunately condition expect remain next 48 hours gonzalez say mar del plata naval base 420 km 240 miles south buenos air submarine head toward vanish search 80 percent area initially target operation turn sign submarine ocean surface crew ample supply food oxygen balbi say navy say electrical outage diesel-electric-propelled vessel might down communications protocol call submarine surface communication lose three boat leave mar del plata saturday radar detection probe follow path submarine would take arrive base reverse balbi say probe allow boat sweep ocean floor journey try make record floor three dimension balbi say u.s. navy say four aircraft carry submarine rescue chamber design world war ii reach bottom submarine depths 850 feet rescue six people time chamber seal submarine hatch allow sailors move vessels say also bring remote-controlled vehicle submerge control surface dramatic search captivate nation 44 million recently mourn loss five citizens kill truck driver plow bicycle path new york city crew members relatives gather mar del plata naval base submarine expect arrive around noon sunday ushuaia however would unusual storm cause delay balbi say entrance base locals hang sign message support crew members families chain-link fence strength argentina trust god wait read message inscribe celestial blue-and-white argentine flag hang fence let go men steel wait home read message write picture submarine argentine-born pope francis mention miss vessel sunday noon prayer also pray men crew argentine military submarine miss pontiff say 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 satellite call yield clue miss argentine submarine