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Hazard 4 Heavy Water Diver Nightwatch B Watch - Black

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Hazard 4 Heavy Water Diver Nightwatch B Watch - Black

The Heavy Water Diver Nightwatch B is a light and durable watch with a titanium watchcase and water resistance up to 300 meters. It is equipped with tritium backlighting and a precise Swiss movement. It is suitable for use in difficult conditions, both underwater and on land.

Titanium watchcase, quartz movement

The watch is equipped with a Ronda 515 quartz movement powered by a Renata 371 battery. The 50 mm diameter watchcase is made of grade 2 titanium, making the whole watch lightweight, durable and hypoallergenic.

Water resistance of 30 atmospheres protects the watch during diving to 300 meters and swimming. A unidirectional, notched diving bezel with a tritium zero indicator and a screw-down crown allow for precise setting of dive time. The large crown size makes it easy to operate with gloves on or underwater.

The watch face has large, easy-to-read digits in a military style, made with 3D technology. The integrated 24-hour scale allows for easy reading of time in military format. Inside the dial is an additional ring with minute markings for improved visibility.

The dial has a date display that shows the current day of the month.

The watch is protected by scratch-resistant sapphire crystal with an internal anti-reflective coating, which guarantees excellent readability even in direct sunlight.

Tritium backlighting

The pointers, indices, and zero marker are integrated with tritium microtubes that constantly emit a bright light without requiring activation. These tubes are elevated by 80% above the dial's surface, ensuring visibility from multiple angles and guaranteeing readability in darkness.

Tritium features a half-life of 12 years, meaning its brightness diminishes to half after this period.

Durable strap

The watch comes with a robust rubber strap featuring a grooved texture with a map motif and numerous holes to efficiently wick away moisture, enhance ventilation, and prevent sweat buildup on the wrist. This material is resistant to both moisture and perspiration, making it ideal for vigorous activities. A special lock secures the strap to prevent accidental unfastening.

A quick-change strap system featuring screw-in pins enables easy adjustments to fit your preferences. Removal requires a Torx 6 screwdriver.

Set elements

  • Heavy Water Diver Nightwatch B timepiece - Black
  • case

Main features

  • Quartz movement
  • Titanium watchcase
  • Large dial
  • Clear digits
  • Sapphire glass
  • Tritium backlight
  • Water resistant up to 30 ATM
  • Lightweight design
  • Diving bezel
  • Screw-down crown
  • Ergonomic strap
Hazard 4


MILITARY is the exclusive distributor of Hazard 4 in Poland.


Hazard 4 is an American brand specializing in the design of advanced tactical equipment and clothing for the military, uniformed services, outdoor enthusiasts, and extreme sports enthusiasts. Its motto, “Progressive Modular Gear,” reflects an approach based on continuous development and modularity, allowing equipment to be easily adapted to changing conditions and tasks. The products are manufactured using modern technologies, such as durable Cordura materials, laser-cut MOLLE panels, water-repellent coatings, and ergonomic carrying systems inspired by military solutions. Before the brand officially entered the market, its civilian models were already in operational use by professionals, including FBI agents, aviation personnel, and foreign unit operators, who often removed the Civilian series markings to adapt the equipment to the specifics of tactical operations. Today's Hazard 4 portfolio is a response to the real needs of these users – a combination of durability, functionality, and innovative thinking about the design and ergonomics of the equipment.

More Information
Gender Men's
Smartwatch No
Body material Titanium
Type of mechanism Quartz
Watch power supply Renata 371
Strap Rubber
Glass Sapphire
Alarm No
Date stamp Yes
Stopwatch No
Backlight Yes
Waterproof 30 ATM / 300 m
NFC No
Calendar No
Compass No
GPS No
Barometer No
Thermometer No
Altimeter No
Chronograph No
Pedometer No
Calorie counter No
Heart rate measurement No
Pulse oximeter No
Weight 108 g
EAN 816211013261
Manufacturer code HWD-TIPV-KW-GGYG
Brand Hazard 4

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