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SSD Air Sup > Board Questions > Flashcards

Board Questions Flashcards

1
Q

What is the Permissible Exposure Limit (PEL) distance for sonar?

A

Wet suit un-hooded start at 1,000 yards Wet suit hooded start at 600 yards Helmet start at 3,000 yards Move in to diver comfort

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2
Q

Distance between ship and pier/ depth limit on the keel

A

Positive clearance of 4 ft (20 for carrier) between ship and pier. 6 ft between keel and bottom at mean low tide.

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3
Q

What is the max depth for XLDS with KM-97 SS

A

132 fsw

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4
Q

What is the max depth of XLDS with Mk-20

A

150 fsw

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5
Q

What are EGS requirements

A

Minimum air to make it back to your first stop

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6
Q

How long is a typical Vent

A

::20

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7
Q

What are the 5 steps of deliberate ORM

A

1 Identify Hazards 2 Assess Hazards 3 Make Risk Decisions 4 Implement Controls 5 Supervise

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8
Q

Working standby, when can you use one

A
  • No decompression dive of 60ft or less - Same job/location - Prior to deploying the standby diver, the work area shall be determined to be free of hazards - UWSH or UCT work (Salvage not authorized)
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9
Q

After each dive mission, how long does the ORM have to be retained

A

60 days following the mission/evolution CG dive manual chapter 3 section B

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10
Q

What is the Minimal personnel for XLDS

A

Dive Supervisor 1 (a) Comms and Logs (a,b) Console 1 (b) Standby Diver (b) 1 (c) Diver Tender 1 (d) Standby Diver Tender 1 ——————————————- Total 6 (e,f) (a) Dive Supervisor may preform Comms/Logs as required (b) Console operator may also serve as Comms/Logs (c) SCUBA shall not be used for standby diver for surface supplied diving (e) Six is the minimum number of qualified divers for surface supplied diving, seven or more is highly recommended based on ORM (f) All divers must be CPR qualified

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11
Q

What are the dive supervisors responsibility

A
  • Execute dives in a safe and effective manner - Discontinue diving operations in the event of unsafe dive conditions - Know and comply with rules, limits, procedures, and authority - Be included in operational planning and conduct ORM
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12
Q

What is the procedure for decompression sickness in water? (Diver remaining in the water)

A
  1. Dispatch the standby diver to assist. Continue to decompress the other divers according to the original schedule.
  2. If the diver is decompressing on air at 30 or 20 fsw, switch the diver to 100% oxygen if available.
  3. Have the diver descend 10 fsw. If significant relief of symptoms is not obtained, have the diver descend an additional 10 fsw, but no deeper than 40 fsw if the diver is on oxygen.
  4. Remain at treatment depth for at least 30 minutes.
  5. If the diver is on air, resume decompression from treatment depth by multiplying subsequent air or oxygen stop times in the Air Decompression Table by 1.5. If recompression went deeper than the depth of the first stop on the original air decompression schedule, insert intervening stops in 10 fsw incrementsbetween the treatment depth and the original first stop depth equal to 1.5 times the original first stop time.
  6. If the diver is undergoing treatment on oxygen at 40 fsw, return to the surface by multiplying the 30 and 20-fsw oxygen stop times by 1.5. If the original schedule did not call for a 30-fsw oxygen stop, insert a 30-fsw oxygen stop with a stop time equal to the 20-fsw stop time.
  7. If the diver is undergoing treatment on oxygen at 30 fsw, return to the surface by multiplying the 20-fsw oxygen stop time by 1.5.
  8. If the diver is symptom-free upon surfacing, place the diver on oxygen, transport to the nearest appropriate recompression chamber, and treat on Treatment Table 5. This requirement may be waived for dives conducted in remote locations that do not have recompression chambers within a reasonable travel distance. If the diver is not symptom-free upon surfacing, transport the diver to the nearest chamber and treat on Treatment Table 6.
  9. If a recompression chamber is immediately available on the dive station, the diving supervisor may elect to forego treatment with in-water recompression and surface the diver for treatment in the recompression chamber or treat the diver in the water for 30 minutes to relieve symptoms, then surface the diver for further treatment in the recompression chamber. In either case, the surface interval should be 5 minutes or less, and the diver should be considered to have Type II decompression sickness, even if the symptoms are Type I. After completing recompression treatment, observe the diver for at least 6 hours. If any symptoms recur, treat as a recurrence of Type II symptoms. UNS DIVE MAN REV 7 A
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13
Q

What is the procedure for a missed 20’ or 30’ decompression stop with no level I chamber available

A

Less than 1 Min -

Return to depth of stop, increase stop time by 1 min. Resume decompression according to original schedule

Greater that 1 Min-

Return to depth of stop multiply 30 and/or 20 fsw air or O2 stop times by 1.5

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14
Q

EP-1: Sudden Loss of HP air supply to diver circuit due to damaged topside supply systems or components.

(XLDS SCUBA CONFIGURATION)

A

Cylinder burst disc ruptures or O-ring failure.

 Secure affected cylinder.

 Shift to secondary air supply.

 Verify bank and MMP pressures.

 Notify Dive Supervisor

Whip failure from air supply to HP-1/HP-2 block.

 Secure HP-1 or HP-2.

 Shift to secondary air supply.

 Verify bank and MMP pressures.

 Notify Dive Supervisor

Whip failure from HP-1/HP-2 block to console.

 Secure HP-1 or HP-2.

 Open cross connect XC-1 or XC-2.

 Verify bank and MMP pressures.

 Notify Dive Supervisor.

Loss of air cannot be isolated and MMP cannot be maintained.

 Notify Dive Supervisor.

 Notify diver(s) to go on EGS.

 Have diver(s) verify steady flow is closed and dial-a-breath is adjusted properly.

 Get EGS cylinder pressure.

 Notify Dive Supervisor.

(XLDS EP UPDATED NOV 08 2018)

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15
Q

EP-2: Loss of air, No warning or Sound of Venting Air

(XLDS SCUBA CONFIGURATION)

A

Loss of HP supply pressure.

  • Check valve line-up on XLDS console.
  • Switch to secondary air.
  • Verify bank and MMP pressures.
  • Notify Dive Supervisor.

Loss of MP supply pressure.

  • Check RDC Regulator is set to 350-375psig.
  • Adjust RDC Regulator pressure accordingly.
  • Have diver(s) verify dial-a-breath is adjusted properly.
  • Have diver(s) verify umbilical is free to the surface, not pinched or cut.
  • Verify bank and MMP pressures.
  • Notify Dive Supervisor.

Loss of air cannot be isolated and MMP cannot be maintained.

  • Notify Dive Supervisor.
  • Notify diver(s) to go on EGS.
  • Have diver(s) verify steady flow is closed and dial-a-breath is adjusted properly.
  • Get EGS cylinder pressure.
  • Notify Dive Supervisor.
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16
Q

EP-3: Uncontrolled Loss of Air at the Control Console

(XLDS SCUBA CONFIGURATION)

A

Activation of Over-Pressure Relief valve.

 Adjust RDC Regulator to maintain 350-375psig.

 Verify bank and MMP pressures.

 Notify Dive Supervisor.

Over pressurization of system and Over-Pressure Relief valve does not lift.

 Adjust RDC Regulator to maintain 350-375psig.

 Verify bank and MMP pressures.

 Notify Dive Supervisor.

RDC regulator cannot maintain 350-375psig.

 Secure HP-1 or HP-2.

 Open cross connect XC-1 or XC-2.

 Verify bank and MMP pressures.

 Notify Dive Supervisor.

System MMP drops below 350 psig and cannot be maintained. Example failure of Over-Pressure Relief Valve to reseat.

 Notify Dive Supervisor.

 Notify diver(s) to go on EGS.

 Have diver(s) verify steady flow is closed and dial-a-breath is adjusted properly.

 Get EGS cylinder pressure.

 Secure HP-1 and HP-2.

 Notify Dive Supervisor.

(XLDS EP UPDATED NOV 09 2018)

17
Q

How long is the Grab Line

A

20 Ft

18
Q

Inside Diamiter of the Pneumofathomter hose

A

3/16

19
Q

What is the Max Breaking Strenth of the Unbilical

A

2,200 LBS

20
Q

What is the Strength Member Lifting Strenth

A

800 LBS

21
Q

XLDS unbilical Inside Diamiter

A

1/4

22
Q

Level I Chamber Definition

A

A U.S. Navy certified recompression chamber close enough to the dive site to support surface decompression with a surface interval of 5 min

23
Q

Level II Chamber Definition

A

A U.S. Navy certified recompression chamber accessible within one hour of casualty

24
Q

Level III Chamber Definition

A

A U.S. Navy Certified recompression chamber accessible within six hours of a the casualty

25
Q

CAT I Comtaminted Water

A
  • Grossly contaminated
  • Extreme risk of injury (even death)
  • Fully encapsulated diver
26
Q

CAT II Contaminated Water

A
  • Heavily contaminated
  • High risk of injury
  • Fully encapulated diver
27
Q

CAT III Contaminated Water

A
  • Moderately contaminated
  • Some risk of injury (especially if ingested)
  • Full face mask (skin covered as necessary/posative pressure whenever practical)
28
Q

CAT IV Contaminated Water

A
  • Baseline contamination (Bathing water)
  • Low Risk
  • Standard Diving Dress
29
Q

Minimum Emergency Equipment on Dive Side

A
  • Communications equipment capable of reaching help
  • A fully stocked first aid kit
  • Portable O2 supply with sufficient capacity
  • BVM with O2
  • Mean of immobilizing diver
  • Means of extracting stricken/unconscious diver from water
  • AED w/razor
30
Q

XLDS-Acceptable leakage applies to what fittings and joints?

A

This leakage is acceptable for pipe thread fittings and joints only, O-ring and or any other types of leakage must be repaired prior to use.

31
Q

How is the field check for checking and quantifying leaks preformed?

A

To check for leaks, ensure the umbilical supply valves, pneumofathometer valves, and cross connect valves are shut, then slowly open each cylinder HP supply valve, and each supply block valve approximately 1/4 -1/2 turn, and pressurize each HP circuit, using at least a 3000 PSIG supply pressure. Load each regulator to 350-400 PSIG and allow the system to settle for at least one minute then secure the cylinder valves only, and record the high and low pressures and the time. Allow the system to sit for ten minutes, then check the gauges. If there has been any loss of pressure, apply soapy water solution to all joints and fittings to identify the leaks. Very minor leaks at pipe threaded joints, that cause a drop of gauge pressure of no more than 10 PSIG in ten minutes, with the supply isolated at the HP blocks as noted on each of the high-pressure gauges, do not require immediate re-sealing. Pressure loss in excess of 10 PSIG, represents a gas loss in excess of 3 liters in ten minutes, and should be corrected before the system is used.

32
Q

Commercial source of air- unable to provide documentation for meeting air purity standards, can CO authorize?

A

When a commercial air supplier is unable to provide documentation that air meets the air purity standards of Table 4-1 the Commanding Officer may authorize use of the commercial air for an individual mission, not to exceed 30 days, utilizing DP surface augmented diving apparatus or SCUBA in water 38 degrees F and above. The air source shall be evaluated against the requirements of the Non-Navy Compressors Check Sheet. The compressor check sheet is available on the secure SUPSALV website at 00C3/diving publications.

33
Q

When would you let your diver be transported to a mono-place chamber for treatment?

A

The only time I would allow this to happen is if the military approved or non military doble lock chamber had a catastrophic failure and it was my only option to treat the stricken diver. (subjective answer)

34
Q

C-130H can be pressurized?

A

Yes, it has a fully pressurized cargo hold that can be changed for cargo or passengers.

Reference: C-130 Lockheed Martin

35
Q

Umbilical soaking solution for Contaminated Water Diving?

A

Soaking umbilical in a bleach based solution is not recommended. Use an alternative solution such as TSP or soap such as Simple Green

Reference: Contaminated Water Dive Man Rev 2 (5-3.3)

36
Q

Cleaning Solution used for Decom in Contaminated Water Diving (CWD)

A

For most initial equipment removal and washdown a bleach solutions are adequate and should not degage equipment when used for short periods of time and then rinsed away. However, you should use the Table 5-1 in the CWD manual for the most appropriate cleaning solution for the contaminate. (Potable Water/Antimicrobial Soap/Bleach/Betadine/Simple Green/ Wuatemart Ammonium/TSP/Alcohol/Easy DECON Df200)

Reference: Contaminated Water Dive Manual Rev 2

37
Q

“First Flush” 72hrs?

A

It doesn’t define it as 72 hours the manual defines it as “Dive planned during or in the days immediately following, a large rainfall should anticipate exposure to a variety of chemical and microbiological hazards when diving in an area with a reasonable expectation of “first flush” effects.”

Reference: Contaminated Water Diving Manual Rev 2

38
Q

Tender considerations for all CAT

A

CAT I

Topside Dress will need to be tailored to meet specific risks of the dive (most likely Level C as directed by OSHA standard 29 CFR

CAT II

Topside personnel will require protection such as Tyvek suits or similar, rubber gloves meeting OSHA standard 29 CFR and face protection from splash hazards

CAT III

The level of skin protection is not presently mandated, however should be addressed in ORM

CAT IV

No additional procedures for diving in CAT 4

Reference: Contaminated Water Diving Manual Rev 2

39
Q

Where/how are CAT CWD documented

A
  • Dive Log, List in DJRS with known contaminants follow the NIOSH Pocket Guide to Chemical Hazards
  • Medical Record, document contaminants, exposure times, and the team members assignment
  • Historical Data Collection (CAT I & II) sent to NAVSEA 00C3 with following

+ Narrative of mission

+ Explanation for the dive and DECON

+ ORM plan

+ Equipment used

+ Personnel issues encountered

+ Disposition of HAZMAT

Reference: Contaminated Water Diving Rev 2 (5-6)

SSD Air Sup (4 decks)

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