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This review is from: Casio Men's PAW1500-1V "Pathfinder" Multi-Function Digital Watch (Watch)
For those who aren't familiar with atomic time watches, it works something like this. The National Institute of Standards and Technology (NIST) maintains super-accurate cesium atom and hydrogen atom clocks (hence "atomic time"). Astronomical observations from the U.S. Naval Observatory are used to keep the atomic clocks in synch with the actual rotation of the earth and its orbit around the sun. The resulting time information is then broadcast via short wave radio from Fort Collins, Colorado. An "atomic time" watch picks up the radio signal and adjusts its time to match it. Simply leave your watch near a window at night, and it will automatically adjust the time. Your watch will always be super-accurate within a fraction of a second (theoretically at least).
I've had many Casio watches over the years including a solar powered Casio G-Shock with atomic time that I've had now for 5-6 years. It still works perfectly. It's been in very hot weather, sub-zero cold weather, in the ocean, in the snow, in high-pressure car washes, in luggage compartments at 40,000 feet, and it still works perfectly. The damn watch won't die! The only reason I bought a new Pathfinder was because I felt due for a new watch. I don't need an altimeter, barometer, compass, moon phase nor tide indicator, I just wanted a new damn watch!
That being said, the Pathfinder PAW1500-1V is a really cool watch for gadget lovers. You can view the phase of the moon for the current date as well as for any other date. Not only can you view the tide for the current time and place, you can see the "lunitidal interval", whether it is spring tide or neap tide (I don't know--ask a surfer), and you can get this information for any time on any date.
In addition to the current barometric pressure, you can display a graph of the trend of barometric pressure readings to help forecast the weather. And then there's a compass, an altimeter, world time (all 29 time zones--yes, there's 29--not 24), a countdown timer, and 5 alarms. The atomic time feature also works in most of Europe and Japan (they have their own atomic time broadcasts) as well as most of the U.S. and parts of Canada.
All of this is solar powered. So long as the watch gets a little sunlight now and then, you never need to replace the battery. Did I mention that that this watch is water resistant to 200 meters?
If past experience with Casio watches is any indicator, I expect my PAW1500-1V to be an extremely durable and reliable watch for many years. BTW, it is really cool looking, and you'll want it to be visible the next time you're in the conference room where everyone else is wearing those bogus diving watches.
It's been 3 years since I bought this watch. Still works perfectly. Wear it most days. Wear it in the shower at the gym. Been through hot summers, cold winters, blizzards, wore it in the Ocean. No problems. No battery replacement--solar powered. No setting the time--atomic time--just leave it on the window sill at night. Super accurate.
Don't use the gadgets much (i.e. compass, barometer, moon phases, tides, etc.). Those were only good for new gadget euphoria. Time zones are convenient when traveling.
Although the watch is huge, it is still very comfortable and lightweight. I"m saying this after 3 years of wearing almost daily.