Marine gas mixtures are specialized blends of gases used in underwater diving and submarine operations. Gas systems in marine environments manage the storage, distribution, and monitoring of these gases for safety and efficiency. These systems are critical for life support, decompression, and underwater breathing applications.

Marine Gas Mixtures typically include blends like Heliox (He-O2), Trimix (He-N2-O2), and Nitrox (N2-O2), with sizes ranging from small cylinders (3L) to large banks (50L+). Grades vary from recreational (EAN32, EAN36) to technical (TMX 18/45). Viscosity is gas-dependent, with helium being less viscous than nitrogen. Buoyancy characteristics depend on gas density; helium reduces buoyancy loss at depth. Materials include aluminum or steel cylinders, with working pressures of 200-300 bar. Gas systems feature regulators, manifolds, and valves, often made from brass or stainless steel for corrosion resistance.