Hazard 4 Heavy Water Diver Nightwatch B Watch - Black

Engineered for resilience, the Heavy Water Diver Nightwatch B combines a titanium watchcase with water resistance up to 300 meters, delivering both durability and a lightweight profile. Outfitted with tritium backlighting and a high-precision Swiss movement, this watch offers uncompromising reliability for demanding environments beneath the surface and on land alike.

Outfitted with a Ronda 515 quartz movement and powered by a Renata 371 battery, the watch boasts a 50 mm case crafted from grade 2 titanium, ensuring the entire watch remains lightweight, sturdy, and hypoallergenic.

A robust water resistance of 30 atmospheres means secure protection for dives reaching depths up to 300 meters or while swimming. Featuring a serrated, unidirectional diving bezel with a tritium zero marker and a large, easy-grip screw-down crown, the model ensures accurate dive time adjustments, even with gloves or underwater.

Large, pronounced 3D numerals in military style dominate the dial. The integrated 24-hour scale delivers straightforward military time reading, while an added minute track around the inner dial enhances overall legibility.

A dedicated date display provides a clear view of the current day of the month.

Entire watch is shielded by a highly durable sapphire crystal with internal anti-reflective coating, optimizing time visibility even in direct sunlight.

Hands, hour markers, and the zero indicator feature tritium microtubes filled with gas, delivering steady, high-intensity illumination that requires no activation. These tritium tubes are elevated by 80% above the dial surface, ensuring excellent visibility from various angles, not just top-down. A tritium-powered backlight guarantees the watch remains readable under any lighting conditions, including total darkness.

Tritium possesses a half-life of 12 years, which means its brightness will decrease to half after 12 years of use.

Equipped with a robust rubber strap, the watch features a grooved surface with a map-inspired design and multiple perforations that effectively channel moisture, enhance airflow, and minimize sweat accumulation on the wrist. Crafted from materials engineered to withstand both moisture and perspiration, the strap is perfectly suited for demanding outdoor use. A specialized locking mechanism on the strap secures it in place, preventing accidental release during intense activity.

The strap boasts a quick-change system utilizing screw-in pins, allowing users to seamlessly tailor the watch to their personal preferences. Disassembly requires a Torx 6 screwdriver.

• Heavy Water Diver Nightwatch B tactical watch – black
• Case

• Powered by a quartz movement
• Constructed with a titanium case
• Features a large face
• Displays high-visibility numerals
• Equipped with sapphire crystal
• Illuminated by tritium backlighting
• Offers 30 ATM water resistance
• Engineered with a lightweight structure
• Includes a diver's bezel
• Secured with a screw-down crown
• Fitted with an ergonomic band