mexico. >> in an exclusive interview, alvarenga says his boat was smacked by a large wave and both its engine and radio blew out. he says he completely lost track of time as the days at sea turned into months. he said he nearly gave up and contemplated suicide. but he says fear and his faith in god pushed him through. >> wilson! wilson! >> amazing survival stories like this have often been filmed. experts say survival is possible, but raise questions about what happened on board that boat. >> one of the things that struck me was the condition that he was in. i would expect a little bit more body weight loss. >> cnn tracked down alvarenga's parents in el salvador.