The Gravitymaster Series of watches were conceived and developed as aviation timepieces. The watch features a new type of World Time function that is designed with international pilots in mind. In addition to the time in your current location, which is indicated by wide hour and minute hands, a second time can be indicated by the dial 9 o’clock. Other pilot-friendly functions include a large button at 9 o’clock that can be used to trigger a 60-second continuous bearing or temperature sensor reading with a single press. Also, a high-luminosity LED display light enables reading of display information even in the dark. All of this and much mode make this Casio G-Shock Gravitymaster Men's Sports Watch model the logical choice as an aviation watch. Twin Sensor.Twin Sensor capabilities provide instant access to direction and temperature information when needed under tough conditions. Shock Resistant Structure. CASIO’ proprietary G-Shock structure absorbs and repels strong shocks and vibrations. This core G-Shock technology continues its perpetual evolution. Knobby protective forms are adopted for the case and bezel design. These projections guard the watch against impacts such as dropping shocks from any direction. They prevent damage by easing shocks to the buttons, which are connected directly with the module, as well to the glass surface and case back. Water Resistance. A standard by every G-Shock, this capability enables users to wear their watch during water-related activities ranging from washing dishes or washing the car to swimming, skin-diving and jet skiing.