Casio G-Shock GULFMASTER Analogue-Digital GWN-1000B-1A Men's WatchCasio G Shock GULFMASTER Analogue Digital GWN 1000B 1A Men's Watch The new Gulfmaster is built on things you need in the ocean or when flying over it. It predicts weather changes and points out directions, which are crucial if you want to survive the deepest seas. This maritime G Shock from Casio comes with Smart Access technology and Triple Sensors, allowing other things like Barometric Pressure reading, Altitude measuring and Temperature recording.