6-28 Change A
U.S. Navy Diving ManualVolume 2
Air Supply. The quality of divers breathing air is vitally important. Air supplies
provided to the diver in tanks or through a compressor shall meet five basic
Air shall conform to standards for diving air purity found in sections 4-3 and
Flow to the diver must be sufficient. Refer to the appropriate equipment oper-
ations and maintenance manual for flow requirements.
Adequate overbottom pressure shall be maintained at the dive station.
Adequate air supply shall be available to support the duration and depth of the
dive (see paragraph 7-4.1 for scuba; paragraph 8-2.2 for MK 21).
A secondary air supply shall be available for surface-supplied diving.
Diving Craft and Platforms. Regardless of the technique being supported, craft
used for diving operations shall:
Include required lifesaving and other safety gear
Have a reliable engine (unless it is a moored platform or barge)
Provide ample room for the divers to dress
Provide adequate shelter and working area for the support crew
Be able to carry safely all equipment required for the operation
Have a well-trained crew
Other support equipmentincluding barges, tugs, floating cranes or vessels and
aircraft for area searchmay be needed, depending on the type of operation. The
need for additional equipment should be anticipated as far in advance as possible.
Deep-Sea Salvage/Rescue Diving Platforms.
Auxiliary Rescue/Salvage Ship (ARS) (Safeguard Class). The mission of the
ARS ship is to assist disabled ships, debeach stranded vessels, fight fires
alongside other ships, lift heavy objects, recover submerged objects, tow other
vessels, and perform manned diving operations. The ARS class ships carry a
complement of divers to perform underwater ship husbandry tasks and salvage
operations as well as underwater search and recovery. This class of vessel is
equipped for all air diving techniques. Onboard equipment allows diving with
air to a depth of 190 fsw.
Submarine Tender (AS). U.S. submarine tenders are designed specifically for
servicing nuclear-powered submarines. Submarine tenders are fitted with a
recompression chamber used for hyperbaric treatments. Submarine tenders
support underwater ship husbandry and maintenance and security swims.