U.S. Navy Diving ManualVolume 1
! System: (Name or description, consistent with drawings)
! Step, Component, Description, Procedure, Location, Check, Note (read in
! System: High Pressure Air
! Step/Component/Description/Procedure/Location /Initials /Note
ALP-15/Reducer outlet/Open/Salvage Hold/Initials/Note
ALP-GA-7/Reducer outlet/Record Pressure/Salvage Hold/Initials/Note 1
The operator executing the procedure shall initial the Check column. Hazards and
items of particular concern shall be identified in the Note column.
Once NAVSEA or NAVFAC has approved the system OP/EPs, they shall not be
changed without specific written approval from NAVSEA or NAVFAC.
DIVERS BREATHING GAS PURITY STANDARDS
Divers Breathing Air. Divers air compressed from ANU or certified diving
system sources shall meet the U.S. Military Divers Breathing Air Standards
contained in Table 4-1.
Divers breathing air may be procured from commercial sources if a source of
military divers air is not readily available. Divers air procured from commercial
sources shall be certified in writing by the vendor as meeting the purity standards
of FED SPEC BB-A-1034 Grade A Source I (pressurized container) or Source II
(compressor) air. Specifications for this standard are outlined in Table 4-2.
Divers Breathing Oxygen. Oxygen used for breathing at 100-percent concentra-
tions and for mixing of divers breathing gases shall meet Military Specification
Table 4-1. U.S. Military Divers Compressed Air Breathing Purity Requirements for
ANU Approved or Certified Sources.
Oxygen (percent by volume)
Carbon dioxide (by volume)
1,000 ppm (max)
Carbon monoxide (by volume)
20 ppm (max)
Total hydrocarbons (as CH4 by volume)
25 ppm (max)
Odor and taste
Oil, mist, particulates
5 mg/m3 (max)