ENOS stands for "Elektronisches Notruf- und Ortungssystem" – "Electronic Rescue and Location System" - a system developed in Germany for use by divers at sea.[1] ENOS allows people in distress to signal their location when drifting on the ocean's surface so they can be quickly located and rescued. Although the system was especially developed for scuba diving it can also be used for other water sports like windsurfing, jet skiing, sailing and boating.