The Height Gain function sums all meters climbed in a session to show the total ascent during a tour. The carbon fiber bezel is made with a carbon fiber sheet inserted into the fine resin. The top fine resin layer is transparent which allows the the carbon fiber to be visible. Casio state that the watch has a +/- 15 seconds per month. I find with many Japanese manufacturers they understate their accuracy and given that the watch synchs with your app you’ll usually always have total accuracy for the current time wherever you are. Size and Fit

The bezel is formed of three layers of fine resin with carbon fiber inserts. The top layer is transparent, resulting in a bezel that shows the embedded carbon material.

A built-in direction sensor detects magnetic north displaying both this and your current direction on the watch face., Bearing Display: Indicates your course against a recorded bearing, Measuring Range: 0 - 359 degrees, Measuring Unit: 1 degree Technological Prowess: Loaded with features like atomic timekeeping, solar power options, and world time, these watches are as smart as they are tough. I have a couple of small gripes after a solid week of testing. Firstly the lume on the hands should extend to the numbers on the dial too or at the very least an extra single lume dot at the 12 position. This means that in the pitch dark you know ‘which way up’ the watch is and more importantly don’t read the watch with a slightly crooked wrist and inaccurately guess which hour it is. There are times when you don’t want to use the LED night to preserve night vision so being able to accurately know you are reading the dial ‘square’ is important. Ideal for those who love the great outdoors but also want a versatile everyday timepiece, the GG1000-1A8 is both stylish and practical. With Twin Sensors for direction and temperature, it provides essential data for your adventures or everyday tasks. seconds continuous measurement., A built-in direction sensor detects magnetic north displaying both this and your current direction on the watch face., Bearing Display: Indicates your course against a recorded bearing, Measuring Range: 0 - 359 degrees, Measuring Unit: 1 degree

A built-in temperature sensor measures the ambient temperature around the watch and displays it on the LCD, Measuring range: -10°C to 60°C (14°F to 140°F); measuring unit: 0.1°C (0.2°F)

Reviews

When paired with a smartphone, your watch automatically adjusts the time, and records mission logs, using altitude data from the watch and GPS data from the smartphone. The watch features a double LED light which is surprisingly powerful but only stays on for a 3 second burst. The hands of the watch also have lume applied so they remain visible for a long period during the night even without using the LED light to read the time. Bluetooth Connectivity Others: Relative altitude readings (±100 m /±1000 m), selectable measurement interval: 5 seconds or 2 minutes (1 second for first 3 minutes only) For the tactical professional or serious enthusiast, the GWG1000-1A1 is tough to beat. It comes with Multi-Band 6 Atomic Timekeeping and Triple Sensor capabilities (altimeter/barometer, compass, and thermometer), ensuring that you're never off-course. The Vibration Resistant Structure adds an extra layer of durability, especially for those in seismic research fields or construction. Step count (A built-in 3-axis acceleration sensor begins counting steps the moment you start to walk.)

Sunrise and Sunset times are displayed for your chosen location. Ideal for planning outdoor activities. Measuring Capacity: 24 hours, Measuring Modes: Elapsed time, split time, 1st-2nd place times, Measuring Unit: 1/100 second (for the first 60 minutes) 1 second (after 60 minutes) A built-in air pressure sensor measures ambient air pressure and presents this on a display to indicate weather patterns, Display range: 260 to 1,100 hPa (7.6 to 32.5 inHg), Display unit: 1 hPa (0.1 inHg), Pressure tendency graph: Changes in air pressure are represented on the watch face in the form of a graph The watch can act as a GMT world timer watch with 38 timezones including pilots UTC universal time. It also comes with a sunrise and sunset indicator which is very useful when out on trails. StopwatchThe button tones on the mode button can be switched off for discreet operation. Pre-set alarm or timer functions remain active. The thermometer gives you an accurate read of the current temperature which again you can customize in the app for Celsius or Fahrenheit. Best characteristic of watch: Excellent mix of form and function. New case construction and materials are clear upgrade. Legible, attractive dial. Enjoyable to use interface and functions. Step counter adds way for consumer to engage with the watch.

Measuring Modes: Elapsed time, split time, 1st-2nd place times, Measuring Unit: 1/100 second (for the first 60 minutes) 1 second (after 60 minutes) The Dial has hands that are reminiscent of the military dive watches with sword shaped hour hands and arrow point seconds hands that pay homage to the Omega and Rolex military watches of the 1960s to 2000s. Equipped with an impressive range of tech features intended to support land missions, all sensors can be linked to a dedicated app for data capture and mission monitoring. The watch has a triple sensor and an accelerometer: the three sensors detect compass bearing, measure atmospheric pressure/altitude, and gauge temperature, while the accelerometer counts steps. Mud Resistant (helps to ensure that nothing gets into the watch when down and dirty work takes you deep into the dirt and sludge) Designed to work even in the harshest environments, MASTER of G specialty watches take timekeeping to new heights with a rugged design accented in the bright yellow used for emergency rescues.

Model Comparison

The atmospheric pressure tendency graph can show the last 20 minutes or last 56 minutes of measurements. The hand indication of pressure differential shows values in units of ±1 hPa. Update (June 2019): Casio Europe now has the GG-B100 models listed. Other info and features not previously mentioned include: