The Gulfmaster, the G-Shock Series that?s designed and engineered with the maritime adventurer in mind, incorporating both Triple Sensor Version 3 and Smart Access in the same watch. In addition to barometric pressure, altitude, bearing, and temperature readings, these new models also feature Tide Graph and Moon Age capabilities to help keep you in close touch with your natural environment. Sudden extreme changes in barometric pressure are alerted using a dial hand, LCD display, and alarm. Double LED lighting illuminates the LCD, and also adds a face light at 6 o?clock to keep information bright and easy to read even in total darkness. The designs of these watches have been modeled after the look of shipboard instruments to create an attractive marine look. Large buttons are provided for critical light and sensor operations to help make operation easier and more intuitive.