Most helpful positive review
121 of 124 people found the following review helpful
Very accurate once its calibrated
on March 31, 2012
This is my first Casio watch in 20 years. I've had this watch for a month now. I fly airplanes for a living and got this watch for all my hiking and cycling that I do when on the ground. I've found it to be extremely accurate. I am able to calibrate the barometer, thermometer, and altimeter each time before a flight according to airport ATIS. Alternatively, I've used readings from Weather Underground to calibrate it as well. I use a GPS unit to calibrate the altitude or use airfield elevation as a reference.
Once calibrated, the readings are nothing short of phenomenal. When in the cockpit, the altimeter reads exactly what the cabin altitude is to an accuracy of +/-100 feet. (Cabin alt readings are in 100ft scale anyway on flight deck displays). Temperature readings are accurate if you leave it off your wrist for a few minutes (as the manual suggests). The altimeter reads accurately outdoors to within 10ft (cross-checked with a GPS unit) and the barometer is accurate as well - reading 1030hPa when the ATIS reported 1031. Quite remarkable.
All this accuracy boils down to one thing - proper calibration.
Build-wise, the watch is super light. It's easy to forget you're wearing a watch. It's constructed of resin and plastic and so should not take knocks and bumps as well as a tough solar. But hey, for the price, it can't be beat. And yes, it tells the time and displays two timezones, has multiple alarms and tells you the date and day. (Whew) I'm a happy guy.