MK-20 / KM-37 Portable Surface Supplied Diving Systems Practice Test 2025 - Free Diving Systems Practice Questions and Study Guide

Question: 1 / 400

What is the maximum working limit on HEO2 in KM37 diving?

300 FSW

350 FSW

380 FSW

The maximum working limit for Helium-Oxygen (HEO2) mixtures in the KM-37 diving system is established at 380 feet of seawater (FSW). This limit is significant because it reflects the depth at which divers can safely operate with the specified gas mixture.

This maximum depth is determined based on several factors, including the physiological effects of breathing gases at increased pressures, the risks of nitrogen narcosis, and the potential for oxygen toxicity. HEO2, being a lighter mixture primarily composed of helium and oxygen, is designed to mitigate these risks at greater depths, enabling divers to maintain operational efficiency and safety.

While diving deeper than this limit could increase the risk of adverse effects due to the gas mixture, the KM-37 system is engineered to ensure divers can perform their tasks effectively while adhering to the depth restrictions of the gas composition in use.

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400 FSW

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