While not the exact same situation, it seems the response is to keep trying and to ask nearby planes to find them and get their attention. https://www.youtube.c

While not the exact same situation, it seems the response is to keep trying and to ask nearby planes to find them and get their attention. https://www.youtube.com/watch?v=027yV9p7W5I https://www.youtube.com/watch?v=027yV9p7W5I