The ongoing search for a missing Argentine navy submarine sheds light on the difficulty of finding a vessel that's designed not to be found -- especially one that might have lost its ability to communicate.
원문출처 : http://www.cnn.com/2017/11/21/americas/argentina-submarine-search-and-rescue-efforts/index.html
원문출처 : http://www.cnn.com/2017/11/21/americas/argentina-submarine-search-and-rescue-efforts/index.html