Chapter 15 Us Navy Dive Manual, Rev 6.

Front 1

What is the title of Chapter 15 of the US Navy Dive Manual?

Back 1

Saturation Diving

Front 2

In your own words, what is the scope of saturation diving?

Back 2

Saturation dining is used for 'deep salvage' or 'recovery' using US Navy deep diving systems or equipment. These systems and equipment are 'designed to support personne'l at depths to '1000 fsw' for 'extended periods of time'.

Front 3

What does the abbreviation DDS refer to in saturation diving?

Back 3

Deep Dive System.

Front 4

What does the abbreviation DDC refer to in saturation diving?

Back 4

Deck Decompression Chamber

Front 5

What does the abbreviation PTC refer to in saturation diving?

Back 5

Personnel Transfer Capsule

Front 6

What is the title of Chapter 15 of the US Navy Dive Manual?

Back 6

Saturation Diving

Front 7

In your own words, what is the scope of saturation diving?

Back 7

Saturation dining is used for 'deep salvage' or 'recovery' using US Navy deep diving systems or equipment. These systems and equipment are 'designed to support personnel's at depths to '1000 fsw' for 'extended periods of time'.

Front 8

What does the abbreviation DDS refer to in saturation diving?

Back 8

Deep Dive System.

Front 9

What does the abbreviation DDC refer to in saturation diving?

Back 9

Deck Decompression Chamber

Front 10

What does the abbreviation PTC refer to in saturation diving?

Back 10

Personnel Transfer Capsule

Front 11

What are three applications of Deep Diving Systems

Back 11

Non-Saturation Diving, Saturation Diving, Conventional Diving Support

Front 12

Why is the Non-Saturation mode of DDS seldom used?

Back 12

This mode has limited real time application

Front 13

Why is the Saturation mode best employed for large construction projects, submarine rescue, and salvage.

Back 13

These projects demand extensive bottom time.

Front 14

What does the Conventional Diving Support mode of DDS used for primarily?

Back 14

Recompression support of conventional diving and Conventional Diving Operations

Front 15

What are major components of a Deep Diving System?

Back 15

PTC, PTC Handling system, and a DDC.

Front 16

Describe a PTC.

Back 16

A PTC is a spherical, submersible pressure vessel that can transfer divers in full diving dress, along with work tools and associated operating equipment, from the deck of the surface platform to their designated working depth.

Front 17

During normal diving operations, where are breathing gases and PTC gases supplied from?

Back 17

The surface via gas supply hose.

Front 18

In addition to surface supplied breathing gas and PTC gas, what does every PTC carry?

Back 18

All PTCs carry emergency supplies of helium, helium-oxygen, and oxygen in externally mounted flasks.

Front 19

Internal PTC pressure, gas supply pressures, and water depth are continuously monitored from where?

Back 19

The PTC.

Front 20

What is a typical Helium system designed to do in a PTC?

Back 20

Maintain PTC pressurization and purge Oxygen from all PTC electrical systems to alleviate fire hazard.

Front 21

In the event of interruption of topside supplied gas to divers' umbilical what happens?

Back 21

The mixed gas system carried on PTC supplies gas to divers' umbilical.

Front 22

In the event of internal contamination of PTC atmosphere, what happens?

Back 22

The mixed gas system supplies breathing gas to BIBS.

Front 23

In terms of PTC Pressurization/ Depressurization, what regulates PTC pressure?

Back 23

The gas supply and exhaust systems regulate internal PTC pressures.

Front 24

What safeguards are in place in PTC to prevent a flask from inadvertently discharging in to PTC?

Back 24

Relief valves and manual vent valves prevent over pressurization of PTC.

Front 25

What devises are in place within a PTC to control depressurization?

Back 25

Needle valves, Depth gauges monitor internal and external depths, Equalization and vent valves.

Front 26

What is included in PTC Life-Support System?

Back 26

Carbon dioxide scrubbers, a gas supply to provide metabolic oxygen, oxygen, and carbon dioxide analyzers.

Front 27

What is the PTC electrical system used for?

Back 27

Heating, internal and external lighting, instrumentation, and communications.

Front 28

Where is normal PTC electrical power supplied from?

Back 28

Surface, via Power and Communication cables.

Front 29

In terms of electrical system, what happens in the event of a power interruption from the surface?

Back 29

A battery supplies critical loads such as atmosphere monitoring, emergency CO2 scrubber, and communications.

Front 30

How many individual systems is a typical communications system divided into?

Back 30

Hardwire Intercom System, Underwater Mobile Sound Communications Set (UQC), Closed-Circuit Television (CCTV), Sound-Powered Phones.

Front 31

What is a MCC?

Back 31

Main Control Console

Front 32

Describe the Hardwire Intercom System.

Back 32

Amplified voice system, helium speech unscrambler, Provide communications between PTC, MCC, Divers, deck winch operator, Deck Officer and DDCs.

Front 33

Describe Underwater Mobile Sound Communications Set (UQC).

Back 33

Wireless emergency communications system, provides voice communications between PTC and Underwater telephone system of attending ship, used if communications cables fail or are disconnected.

Front 34

Describe Closed-Circuit Television.

Back 34

The CCTV consists of video channels from the PTC to the MCC. Cameras are usually mounted outside the PTC.

Front 35

Describe the Sound-Powered Phones installed on DDS.

Back 35

Provides communications between PTC and MCC in case the normal system is lost.

Front 36

What is the Strength, Power, and Communications Cables (SPCC)?

Back 36

Typically provide electrical, wired communications, instrumentation signals, a strength member and coaxial transmission (CCTV) between MCC and PTC.

Front 37

What parts make up a PTC main umbilical?

Back 37

A breathing gas supply hose, a hot water hose, a pneumofathometer, and a strength member.

Front 38

From where is the hot water for the Hot Water System provided.

Back 38

Host ship.

Front 39

What does the hot water of the Hot Water System provide for?

Back 39

Breathing gas heater and diver's suit.

Front 40

Who controls hot water temperature and flow?

Back 40

PTC Operator.

Front 41

What does DDC stand for?

Back 41

Deck Decompression Chamber

Front 42

What does DDC provide for?

Back 42

A dry environment for decompression and if necessary recompression.

Front 43

Describe a DDC.

Back 43

A multi compartmented, horizontal pressure vessel mounted on the surface-support platform.

Front 44

Each DDC is equipped with what?

Back 44

Living, sanitary, and resting facilities for the dive team. It has a service lock for passage of food, medical supplies, and other items the dive team may require.

Front 45

What does a DDC Life-Support System do?

Back 45

Maintains the chamber environment within acceptable limits for the comfort and safety of the diver

Front 46

What systems does a typical LSS consist of?

Back 46

Temperature and humidity control, carbon dioxide removal, and equipment monitoring.

Front 47

A Deck Decompression Chamber consists of what subsystems?

Back 47

DDC Life-Support System (LSS), Sanitary System, Fire Suppression System, Main Control Console (MCC), Gas Supply Mixing and Storage

Front 48

What is the purpose of the MCC?

Back 48

The MCC is the central monitoring and control center of a Saturation Dive.

Front 49

The MCC houses controls for….

Back 49

the gas supply, , atmosphere analysis of the DDC, Atmosphere monitoring for the PTC, pressure gauges for gas banks, clocks, communications systems controls, recorders, power supplies, and CCTV monitors, and switches for the DDC and PTC.

Front 50

What is a "Mixmaker"?

Back 50

Gas-mixing equipment.

Front 51

Describe a Mixmaker.

Back 51

The Mixmaker can provide mixed gas at precise percentages and quantities needed.

Front 52

What are the two diving helmets used in Mixed-gas diving?

Back 52

MK 21 MOD 0 and MK22 MOD 0

Front 53

What is the difference between MK21 MOD 0 and MK21 MOD 1?

Back 53

MK 21 MOD 0 uses a Ultraflow 500, which provides improved breathing resistance an gas flow over the MK 21 MOD 1.

Front 54

What is the main use of MK22 MOD 0?

Back 54

It is used as a for standby diver. It presents a smaller profile for storage.

Front 55

The diver life support system consists of two parts, what are they?

Back 55

An Underwater Breathing Apparatus (UBA) and thermal protection system.

Front 56

Why must active heating suits be employed in Saturation Diving?

Back 56

The depths achieved and high thermal conductivity of Helium.

Front 57

What is the most successful thermal protection currently used in the navy.

Back 57

Non Return Valve (NRV) suit.

Front 58

What are divers required to wear with an active heating suit.

Back 58

The divers are required to wear Polar Tec Dive skins or Neoprene liners underneath them.

Front 59

What is the typical flow of hot water to a hot water suit?

Back 59

4 gpm (3 gpm to suit and 1 gpm to breathing gas heater)

Front 60

ATA=

Back 60

D+33/33

Front 61

Define 'On-Site'

Back 61

Accessible within :30 of the dive site by available transportation.

Front 62

What are the typical Saturation Diving Watch Stations?

Back 62

Diving Officer, Diving Medical Officer, Master Diver, Diving Supervisor, Atmosphere Monitor, MCC Gas-Control Operator, Life-Support Operator, MCC Communications and Log Operator, Surface-Support divers, Gas King, PTC Operators, PTC Divers, Main Deck Supervisors

Front 63

Each diving operation shall have a Master Diving Protocol, what does it contain?

Back 63

A Master Diving Protocol shall contain all information needed to ensure that a dive follows a program and is consistent with the requirements for saturation diving as well as any information that pertains to the specific operational platform.

Front 64

Who signs and approves a Master Diving Protocol?

Back 64

Submitted by MDV. Reviewed and signed by Saturation Diving Officer and signed by Diving Officer. Approved by Commanding Officer.

Front 65

Any alterations must be made by…

Back 65

Diving Officer and approved by Commanding Officer.

Front 66

What are the typical elements of a Master Diving Protocol?

Back 66

Detailed gas usage plan, Compression Schedule, Manning Requirements, and Predive and Postdive procedures.

Front 67

What data must be recorded on a Chamber Atmosphere Data Sheet?

Back 67

Chamber pressure, temperature, humidity, oxygen, and carbon dioxide concentrations. Time of operation of CO2 scrubbers and time of CO2 absorbent replenishment.

Front 68

At what interval is data recorded on Chamber Atmosphere Data Sheet?

Back 68

Hourly.

Front 69

What is the required Oxygen Partial Pressure within a DDC or PTC?

Back 69

.44-.48 ata

Front 70

What is the required Carbon Dioxide Partial Pressure within a DDC or PTC?

Back 70

Less than .005 ppCO2 (.5% SEV) (3.8 millimeters of mercury)

Front 71

Chamber Oxygen Exposure Time Limits and Duration: Storage

Back 71

.44-.48 ata Unlimited

Front 72

Chamber Oxygen Exposure Time Limits and Duration: Excursion

Back 72

.40-.60 4 hours (6 hours but diver performance exponentially decreases between 4 and 6 hours of and in-water excursion.)

Front 73

Chamber Oxygen Exposure Time Limits and Duration: Excursion associated with decompression

Back 73

.42-.48 Unlimited

Front 74

Chamber Oxygen Exposure Time Limits and Duration: Emergency

Back 74

.60 24 hours

Front 75

What should the relative humidity be maintained at?

Back 75

30-80%, 50-70% being ideal for diver comfort, carbon dioxide scrubber performance and fire protection.

Front 76

The fire zone in a chamber is where the Oxygen percentage reaches…

Back 76

6% or higher.

Front 77

Using Standard saturation dining procedures fire is possible at what depth and shallower.

Back 77

231fsw and shallower using .48 ata ppO2

Front 78

All food provided to divers during saturation diving evolution shall meet the standards prescribed in….

Back 78

NAVMED P-5010

Front 79

An initial unmanned screening procedure must be completed when any of what conditions exist?

Back 79

Contamination or suspected contamination of the chamber exists or after any major chamber repair or overhaul has been completed.

Front 80

What may be induced by rapid compression to storage depth, in saturation diving.

Back 80

High-Pressure Nervous Syndrome (HPNS)

Front 81

What compression rate must be used in compression to storage depth in saturation diving? Slowest or Fastest.

Back 81

Slowest rate in consistent with operational requirements.

Front 82

Saturation Diving Compression Rates: 0-60 fsw

Back 82

0.5-30 fsw/min

Front 83

Saturation Diving Compression Rates: 60-250 fsw

Back 83

0.5-10 fsw/min

Front 84

Saturation Diving Compression Rates: 250-750 fsw

Back 84

0.5-3 fsw/min

Front 85

Saturation Diving Compression Rates: 750-1000 fsw

Back 85

0.5-2 fsw/min

Front 86

What are major DDS emergencies?

Back 86

Loss of atmosphere control, loss of depth control and fire in the DDC.

Front 87

Saturation Decompression Rates: 1600-200

Back 87

6 fsw/hour

Front 88

Saturation Decompression Rates: 200-100

Back 88

5 fsw/hour

Front 89

Saturation Decompression Rates: 100-50

Back 89

4 fsw/hour

Front 90

Saturation Decompression Rates: 50-0

Back 90

3 fsw/hour

Front 91

Travel rate for an upward excursion is….

Back 91

2 fsw/min

Front 92

Rest stops

Back 92

8 hours out of every 24 hours. The 8 hours should be divided into at least two periods.

Front 93

After surfacing, divers shall remain in the immediate vicinity of the chamber for….

Back 93

2 hours

Front 94

After surfacing, divers shall remain within :____ of travel time for __:__ after the dive.

Back 94

:30 travel time for 48:00 after the dive.

Front 95

After surfacing, divers shall not fly for __:__

Back 95

72 hours.