Introduction to Fortis: Swiss Aviation and Space Flight Watches

The face also contains a circular moon phaseindicator (more on the moon phase feature below), power reserve and time calibrationindicator, and a fairly large circular LCD "pie" with five slices whichcount off seconds. The circular second counter seems a little large and superfluousto me, but it's a popular option among other G-Shocks, so I guess it's well likedby many. It can alsobe configured to auto-illuminate when the solar sensors in the watch detect thatit is too dark for you to see the face, and when it is tilted toward your face (about40 degrees). The fact that the topLCD is actually an LCD grid, or dot matrix, with a couple hundred "pixels" makesit very versatile, and allows the watch to do slick things like display the hometime while in world time mode. The lower LCD is primarily used for time, or for configuringwhichever mode you happen to be in. And considering the fact that the GW-400J doesn'thave a lot of power or space to work with, I think it performs admirably, thoughnot was well as the much larger and power hungry vibrating TissotHigh-T.I like the fact that the thermometer can be used for measuring both airand water temperature, although I really wish I could toggle it from Celsiusto Fahrenheit. Admittedly, I can't really blame the watch or Casio for thissince it was never meant for an American audience, however one thing I can blamethe watch for is the fact that you don't seem to be able to reset the thermometerto its factory calibration. Overall, I like the Casio GW-400J, except that:It only support Celsius for temperature display, and not Fahrenheit.