Today, some of the most popular sports involve extreme conditions. There's extreme skiing, extreme mountain biking, rock climbing, scaling tall mountain peaks, or sailing alone across the ocean. Usually people doing these things are in isolated or remote locations. Therefore, they are not able to notify anyone if they are in distress.
If someone gets lost, stranded, or injured in one of these remote locations, it is necessary that they get help fast. They are not likely to be close to a telephone line, however, and cellular phones only work when they are within transmitting range of a tower.
Can you design a satellite that will act as an emergency link for people in remote locations? Think about what your satellite must do, how it will communicate, and how it will notify rescue teams if there is an emergency. All of these factors will help you to design a satellite that will be useful in solving the problem described.