Divers Air Sampling Program

NAVSEA Code 00C manages the diver's breathing air sampling program in accordance with OPNAVINST 3150.27 (series). The purpose of the air sampling program is to:

Provide technical support for the operation and maintenance of diver's breathing air compressors and diving air storage systems.

Provide general guidance concerning use of local commercial air sampling sources, including the evaluation of commercial air sampling capabilities and equipment.

Perform program management for centrally funded air sampling services as directed by CNO Code N873D.

Table 4-3. Diver's Compressed Oxygen Breathing Purity Requirements.



General Note: Gaseous and liquid oxygen shall contain not less than 99.5% by volume. The remainder, except for moisture and minor constituents specified below, shall be Argon and Nitrogen.

Type I Gaseous

Oxygen (percent by volume)


Carbon dioxide (by volume)

10 ppm (max)

Methane (CH4 by volume)

50 ppm (max)

Acetylene (C2H2)

0.1 ppm (max)

Ethylene (C2H4)

0.4 ppm (max)

Ethane (C2H6 and other hydrocarbons)

6.0 ppm (max)

Nitrous Oxide (N2O by volume)

4.0 ppm (max)

Halogenated Compounds (by volume):

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