Casio Oceanus Atomic GPS Hybrid Dual Dial OCW-G1000-1AJF Mens WatchCasio Oceanus Atomic GPS Hybrid Dual Dial OCW G1000 1AJF Men's Watch OCEANUS blends elegance with technology. This GPS HYBRID WAVE CEPTOR system runs double check before telling you the time, anywhere on the world. It is the convenience of solar power unified with atomic timekeeping. The watch receives GPS signals from the orbiting satellites to determine the wearers current time and position and adjusts itself also keeping track of summer time.