Casio releases the GWN-Q1000, the latest addition to the ocean concept GULFMASTER Series, part of the G-SHOCK line of shock-resistant watches.

The GWN-Q1000 is the first G-SHOCK equipped with quad sensors to track constantly changing ocean conditions, designed to be useful for coast guard officers and others who are active at sea.

The GULFMASTER GWN-Q1000 is a seagoing concept model equipped with quad sensors to track ocean conditions, aiming to assist coast guard officers and others in security and rescue activities at sea.

The atmospheric pressure sensor helps to predict suddenly changing weather conditions, the temperature sensor reads changes in air and water temperature, the compass bearing sensor helps detect wind and tidal direction, and the water depth sensor measures current depth under water. These sensors enable the user to assess changing ocean conditions in real time, in situations where they may be racing against time and the natural elements.


For ease of access, information from the five sensor modes (atmospheric pressure, altitude, temperature, compass bearing, and depth), as well as sudden atmospheric changes and a tide graph showing low and high tide information, are indicated on the inset dial at the 5 o’clock position. A dual coil motor enables a retrograde movement to display the information, for ease of recognition.

Optimized for use in ocean environments, the watch case is made from carbon fiber materials for superior rigidity. The button casings use metal pipes for high durability and enhanced water resistance. Furthermore, the shock absorbent back cover and watchband are made of soft urethane for better comfort on the wrist.

Technical details


Water resistance: 20-bar
Size of Case: 48.0×57.3×17.0mm
Total Weight: Approx. 115g

Radio Frequencies
77.5 kHz (DCF77: Germany); 60 kHz (MSF: UK); 60 kHz (WWVB: USA); 40 kHz (JJY: Fukushima, Japan) / 60 kHz (JJY: Kyushu, Japan); 68.5 kHz (BPC: China)

Radio Wave Reception
Automatic reception up to six times a day (except for use in China: up to five times a day); manual reception

Water Depth Sensor
Measurement range: 0–50 m (164 ft.); measuring unit: 0.1 m (0.5 ft.); auto memory: start date/time, max. water depth, time spent in water

Digital Compass
Measures and displays direction as one of 16 points with the second hand; measuring range: 0° to 359°; measuring unit: 1°; 60 seconds continuous measurement; auto horizontal compensation; bidirectional calibration; magnetic declination correction

Measuring range: 260 hPa to 1,100 hPa (7.65 to 32.45 inHg); measuring unit: 1 hPa (0.05 inHg); atmospheric pressure change indicator (±10 hPa); atmospheric pressure tendency graph: past 20 hours (10 times, every 2 hours) or past 5 hours (10 times, every 1/2 hour) graph display; barometric pressure tendency information (arrow indicates significant pressure changes)

Measuring range: -700 m to 10,000 m (-2,300 to 32,800 ft.); measuring unit: 1 m (5 ft.); altitude change indicator (±100 m/±1000 m); others: measurement interval setting (every 5 seconds / every 2 minutes)

Measuring range: -10 to 60°C (14 to 140°F); measuring unit: 0.1°C (0.2°F)

Tide Graph
Tide level for specific date and time

Moon Data
Moon age of the specific date

World Time
48 cities (31 time zones; daylight saving on/off, home city/world time city swapping) and Coordinated Universal Time, auto switching/ standard time and Coordinated Universal Time

1/100 second; measuring capacity: 24 hours; measuring modes: elapsed time, split time, 1st and 2nd place times

Countdown Timer
Measuring unit: 1 second (maximum 60 minutes)

5 independent daily alarms; hourly time signal

Other Functions
Manual memory function (water depth, altitude, atmospheric pressure, temperature, compass bearing, time (time stamp function)); sunrise/sunset; full auto-calendar; 12/24-hour format; battery level indicator; button operation tone on/off; full auto double LED light with afterglow:1.5/3.0 seconds; hand-concealment function (manual, auto: water depth/barometer/altimeter/thermometer function)

Power Source
Tough Solar power system (high-capacity solar-charging system)
Continuous Operation: About 23 months with the power-saving function ON after full charge

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