Casio Men's G-Shock GWN1000B Gulfmaster Watch GULFMASTER: For the toughest men who challenge the deepest seas, Casio presents the ultimate maritime G-Shock with Smart Access technology MEASURE: The Gulfmaster is equipped with an atmospheric pressure information function that alerts seafarers to approaching low-pressure systems and storm fronts PREDICTS: Using its advanced sensors, the Gulfmaster watch can predict weather changes TRIPLE SENSOR V3: Triple sensor features a compass, thermometer and depth sensor SHOCK RESISTANT: Because it's G-Shock, it is shock resistant and built to last a lifetime