The diving watch U212 (EZM 16) is made of high-strength, seawater-resistant German Submarine Steel and is 47 mm in diameter. The SINN technologies used in the U212 (EZM 16) make it a robust and accurate instrument for professional diving operations. For example, Ar-Dehumidifying Technology ensures greater functional reliability and freedom from fogging. Temperature Resistance Technology guarantees the functional reliability of the watch in temperatures ranging from –45°C to +80°C. The captive diver’s bezel with minute ratcheting has also been hardened using TEGIMENT Technology, making it especially scratch-resistant. As the clarity and perfect readability of the mission timer from Sinn Spezialuhren are generally important, especially in the dark or under extreme diving conditions, the all-important features for recording the time are luminous.