Divers Air Supply Do Not Touch

Banks of flasks and groups of valves require only one central label at the main stop valve. A volume tank must be part of the air supply system and be located between the supply source and the diver's manifold hose connection. This tank maintains the air supply should the primary supply source fail, providing time to actuate the secondary air supply, and to attenuate the peak air flow demand. 8-6.2.2 Air Compressors. Many air supply systems used in Navy diving operations include at least one...

Dive Recording

Chapter 5 provides information for maintaining a Command Diving Log and personal diving log and reporting individual dives to the Naval Safety Center. In addition to these records, every Navy air dive may be recorded on a diving chart similar to Figure 9-1. The diving chart is a convenient means of collecting the dive data, which in turn will be transcribed in the dive log. Diving Record abbreviations that may be used in the Command Diving Log are Table 9-8. U.S. Navy Standard Air Decompression...

Fire Zone Considerations

Every effort shall be made to eliminate any fire hazard within a chamber. When oxygen percentages are elevated as during the later stages of decompression, a fire will burn rapidly once started, perhaps uncontrollably. As a result, special precautions are necessary to protect the diver's safety when in the fire zone. The fire zone is where the oxygen concentration in the chamber is 6 percent or greater. Using standard saturation diving procedures (oxygen partial pressure between 0.44 and 0.48...

Acfm at bottom conditions

Based upon an actual volume (displacement) flow requirement of 1.4 acfm for a deep-sea diver, the compressor capacity is sufficient to support the working and standby divers at 130 fsw. Sample Problem 3. Find the actual cubic feet of air contained in a 700-cubic inch internal volume cylinder pressurized to 3,000 psi. 1. Simplify the equation by eliminating the variables that will not change. The temperature of the tank will not change so Tj and T2 can be eliminated from the formula in this...

NOTE The rules using the 07 ata ppO2 tables are the same for nitrogen and helium however the tables are not

These tables are designed to be used with MK 16 UBA (or any other constant ppO2 closed-circuit UBA) with an oxygen setpoint of 0.7 ata or higher. When using helium as the inert gas, the amount of nitrogen must be minimized in the breathing loop. Flush the UBA well with helium-oxygen using proper purge procedure in the MK 16 UBA O& M manual. Tables are grouped by depth and within each depth group is a limit line. These tables are designed to be dived to the limit line. Schedules below the...

Portable Surfacesupplied Diving Systems

Fads Dive Sysem Consle

8-4.1 MK 3 MOD 0 Lightweight Dive System (LWDS). The MK 3 MOD 0 LWDS is a portable, self-contained, surface-supplied diver life-support system (DLSS). The MK 3 MOD 0 LWDS can be arranged in three different configurations and may be deployed pierside or from a variety of support platforms. Each LWDS includes a control console assembly, volume tank assembly, medium-pressure air compressor (optional), and stackable compressed-air rack assemblies, each consisting of three high-pressure composite...

Principles Of Operation

Navy closed-circuit mixed-gas UBA is a constant partial-pressure-of-oxygen rebreather. To conserve the gas supply and extend underwater duration, the efficiency of gas use is improved by Removing carbon dioxide produced by metabolic action of the body. Adding pure oxygen to the breathing gas to replace the oxygen consumed. Recirculating the breathing gas for reuse. Figure 17-2. MK 16 MOD 0 UBA Functional Block Diagram. 17-2.1 Recirculation and Carbon Dioxide Removal. The diver's...

NOTE An essential operating or maintenance procedure condition or statement which must be highlighted

WARNING Hyperventilation is dangerous and can lead to unconsciousness and death. (Page 3-20) WARNING Never do a forceful Valsalva maneuver during descent or ascent. During descent, this action can result in alternobaric vertigo or a round or oval window rupture. During ascent, this action can result in a pulmonary overinflation syndrome. (Page 3-23) WARNING Do not use a malfunctioning compressor to pump diver's breathing air or charge diver's air storage flasks as this may result in...

NOTE Once recompression to 60 feet is done Treatment Table 5 shall be used even if it was decided symptoms were

Treatment Table 6 is used for the following Type I symptoms where relief is not complete within 10 minutes at 60 feet or where a neurological exam is not complete Severe carbon monoxide poisoning, cyanide poisoning, or smoke inhalation Arterial gas embolism Symptomatic uncontrolled ascent Asymptomatic divers with omitted decompression greater than 30 minutes Treatment of unresolved symptoms following in-water treatment Recurrence of symptoms shallower than 60 fsw...

Recompression Treatments When No Recompression Chamber

IS 21-4.1 Transporting the 21-4.1.1 Medical Treatment During 21-4.1.2 Transport by Unpressurized 21-4.1.3 Communications with 21-4.2 In-Water 21-4.2.1 Surface Oxygen 21-4.2.2 In-Water Recompression Using 21-4.2.3 In-Water Recompression Using Oxygen 21-10 21-4.2.4 Symptoms After In-Water 21-4.3 Symptoms During Decompression (No Chamber Available) 21-11 21-5 RECOMPRESSION TREATMENTS WHEN CHAMBER IS AVAILABLE 21-11 21-5.1 Symptoms During Decompression and Surface Decompression (Recompression...

List of Tables

2-1 Pressure 2-2 Components of Dry Atmospheric 2-3 Partial Pressure at 1 2-4 Partial Pressure at 137 2-5 Symbols and 2-6 Buoyancy In 2-7 Formulas for 2-8 Formulas for 2-9 Formulas for Partial Pressure Equivalent Air 2-10 Pressure 2-11 Volume and Capacity 2-12 Length 2-13 Area 2-14 Velocity 2-15 Mass 2-16 Energy or Work 2-17 Power 2-18 Temperature 3-1 Signs and Symptoms of Dropping Core 3-2 Signs of Heat 4-1 U.S. Military Diver's Compressed Air Breathing Purity Requirements for ANU Approved or...

Volume 2 List of Tables

Diaphragm Lever

7-1 Sample Scuba Cylinder 8-0 MK 21 MOD 1 Overbottom Pressure 8-1 Primary Air System 8-2 Line-Pull 9-1 Pneumofathometer Correction 9-2 Air Decompression Tables Selection 9-3 Sea Level Equivalent Depth 9-4 Repetitive Groups Associated with Initial Ascent to 9-5 Required Surface Interval Before Ascent to Altitude After Diving 9-53 9-6 Unlimited No-Decompression Limits and Repetitive Group Designation Table for Unlimited No-Decompression Air 9-7 Residual Nitrogen Timetable for Repetitive Air 9-8...