Air Diving Supervisor Flashcards
(49 cards)
1
Q
What depth is best suited for Self-Contained Breathing Apparatus
A
Shallower then 100 FSW
2
Q
Saturated Diving supports diving up to what depth?
A
1,000 FSW
3
Q
COA stand for?
A
Course of Action
4
Q
4 parts of the Risk Assessment?
A
- Accept risk when you KNOW the facts
- Accept no unnescessary risk
- Anticipate and manage risk by PLANNING
- Make rish decusion at the right level.
5
Q
5 Parts of ORM
A
- Identify Hazards
- Assess Hazards
- Make Risk Decisions
- Implement Controls
- Supervise
6
Q
What is Task Loading
A
The negative effect on performance of basic task due to additional tasking.
7
Q
What is optimism bias?
A
Unrealistic optismism caused by a person beliving they are less at risk of a mishap compared to others
8
Q
Minimum emergency equipment that shall be on the side
A
- Communications equipment capable of reaching help
- A fully stocked first aid kit
- Portable O2 supply with sufficent capacity
- BVM with O2 connection
- Means of immobilizing diver
- Means of exstracting a stricken diver from the water
9
Q
Some rare instances when you would bypass recompression
A
- Near Drownding
- Major/Severe trauma
- Rapid onset of paralysis with inability to breathe
10
Q
Reporting Criteria for a mishap include all on duty diving cases involving?
A
- All recompression treatments
- Any incidents of Type I or II DCS
- All cases of pulonary over-inflation syndrome
- Any cases of loss of consciousness
- CNS or pilonary O2 toxicity
11
Q
What are the classes of mishaps and what oder?
A
A Worst
B
C
D Least Worst
12
Q
What are some diving hazards or near mishaps?
A
- Shifting to secondary air
- aborted dive due to unexpectedf issue/event
- Trapped/Fouled diver where standby or buddy diver was required
- Lost diver
13
Q
SCUBA Operations
Whats the minimum cylinder size authorized for primary use?
A
50 ft3
14
Q
SCUBA Operations
Supervisors should consider what when dives exceeding 100fsw
A
Independent back up air source
15
Q
SCUBA Operations
When can you use inwater decompression?
A
Only when condidered absolutely necessary and authorized by the CO or OIC
16
Q
SCUBA Operations
What it the minimum manning?
A
4
17
Q
Surface Supplied Air Diving
When can you launch standby diver as a working diver
A
- No “D” dive of 60 fsw or less
- Sam Job/location
- Prior ro deployment, the work area shall be determined free of hazards by first diver on the job site
- UWSH or UCT work (Salvage not authorized)
18
Q
Surface Supplied Air Diving
If a job condition call for using a steel cable or chain as a descent line what must you do?
A
Diving Officer must approve such use
19
Q
Air Decompression Table
For in-water decompression on air is most suitable for dives that do not exceed?
A
15 Min of decompression
20
Q
Air Decompression Table
What are the procedures for shifting to 100% O2 at 30 or 20fsw
A
- Align the console to 100% O2
- Ventilate each diver for 20 seconds
- Verify that the O2 monitoring device shows 100% O2
21
Q
Air Decompression Table
What are your air breaks at 30 or 20 fsw
A
O2 for 30 Min then 5 Min on air
(Air does not count towards required deco)
22
Q
Air Decompression Table
What is the surface decompression on O2 procedures?
A
- Complete any required decompression stops 40 or deeper
- Once finished bring the diver from 40 - surface at 40 fsw per min
- 3 min and 30 undress
- compress diver to 50 fsw at 100 fsw per min
- Once at 50 put diver on O2
23
Q
What is considered Exceptional Exposure Dive?
A
- Any dive deeper than 190 fsw
- Any in-water decompression dive with a total decom time on air or air/O2 greater than 90 Min
- Any SurDO2 dive with a chamber oxygen time greater than 120 min (4 periods)
24
Q
The command must have whos approval to conduct planned exceptional exposure dives?
A
CNO
25
Delay greater than :01 deeper than 50 fsw
Round up the delay, add to btm time and recompute t/s
26
If you recompute a Table and Scedule and the required stop is deeper then current depth, what do you do?
**DO NOT** go back deeper, perfrom any missed stops at divers current depth
27
What is the minimum flask pressure for PSIG Air and PSIF O2?
200 PSIG Air
100 PSIG O2
28
**Surface Decompression on Oxygen Procedure**
1. Complete any required decompression stops on air 40 fsw and deeper.
2. Upon completion of the 40 fsw stop, bring the diver to the surface at 40 fsw/min. If a 40 fsw water stop is not required, bring the diver from the bottom to 40 fsw at 30 fsw/min and then from 40 fsw to the surface at 40 fsw/min. Once the diver is on the surface, tenders have approximately 3 and a half minutes to remove the breathing apparatus and diving dress and assist the diver into the recompression chamber.
3. Place the diver and a tender in the recompression chamber. The job of the tender is to monitor the diver closely for signs of decompression sickness and CNS oxygen toxicity during the subsequent recompression. When two divers undergo surface decompression simultaneously, the dive supervisor may elect not to use an inside tender. In this case, both divers will carefully monitor each other in addition to being closely observed by topside personnel.
4. Compress the diver on air to 50 fsw at a maximum compression rate of 100 fsw/min. The surface interval is the elapsed time from the time the diver leaves the 40 fsw water stop to the time the diver arrives at 50 fsw in the chamber. A normal surface interval should not exceed 5 minutes.
29
What do you do if the Air-Decompression Table does not list a repetive group desginator for a diver?
The diver must have a 18 hour surface interval before making another dive deeper than 20 fsw
30
What are EXCEPTIONAL EXPOSURE DIVES?
* Any air dive deeper than 190 fsw.
* Any in-water decompression dive with a total decompression time on air or air/oxygen greater than 90 minutes.
* Any SurDO2 dive with a chamber oxygen time greater than 120 minutes (4 oxygen periods).
31
**Delay leaving an oxygen stop at 30 fsw or delay between oxygen stops at 30 and 20 fsw.**
Subtract any delay in leaving the 30 fsw oxygen stop or any delay during travel from 30 to 20 fsw on oxygen from the subsequent 20-fsw oxygen stop time. If the delay causes the total time on oxygen deeper than 20 fsw to exceed 30 minutes, shift the diver to air at the 30-minute mark. When the problem has been resolved, shift the diver back to oxygen and resume. decompression. Ignore any time spent on air.
32
**Loss of Oxygen Supply in the Water**
If the diver cannot be shifted to oxygen at 30 or 20 fsw
1. Have the diver continue to breathe air while the problem is investigated.
2. If the problem can be corrected quickly, ventilate the diver with oxygen as soon as the gas supply is restored. Consider any time spent on air as dead time. Remain on oxygen at the stop for the full stop time listed in the table.
3. If the problem cannot be corrected, initiate surface decompression or continue decompression in the water on air. In this situation, the surface interval for surface decompression is the time from leaving the in-water stop to reaching the 50-fsw stop in the recompression chamber.
33
**Loss of Oxygen Supply in the Water**
If the oxygen supply is lost during the 30 or 20-fsw water stops after the diver has shifted to oxygen
1. Shift the diver back to air.
2. If the problem can be corrected quickly, re-ventilate the diver with oxygen and resume the schedule at the point of interruption. Consider any time spent on air as dead time.
3. If the problem cannot be corrected and a recompression chamber is available on the dive station, initiate surface decompression. Compute the number of chamber oxygen periods required by multiplying the remaining oxygen time at the stops by 1.1, dividing the total by 30 minutes, then rounding the result up to the next highest half period. One half period (15 minutes at 50 fsw) is the minimum requirement.
4. If the problem cannot be corrected and a recompression chamber is not available on the dive station, continue decompression on air in the water. Compute the remaining stop time on air at the depth of the loss by multiplying the remaining stop time on oxygen at that depth by the ratio of the air stop time to the oxygen time at that depth.
34
**Contamination of Oxygen Supply with Air**
If the operator discovers that the ORCA is improperly lined up, take the following action
1. Align the ORCA properly.
2. Re-ventilate each diver with oxygen for 20 seconds.
3. Restart oxygen time. Consider any time spent on contaminated oxygen as dead time.
35
**CNS Oxygen Toxicity Symptoms (Non-convulsive) at 30 or 20 fsw Water Stop**
1. If a recompression chamber is available on the dive station, initiate surface decompression. Shift the console to air during travel to the surface. Compute the number of chamber oxygen periods required by multiplying the remaining oxygen time at the stops by 1.1, dividing the total by 30 minutes, then rounding the result up to the next highest half period. One half period (15 minutes at 50 fsw) is the minimum requirement.
2. If a recompression chamber is not available on the dive station and the event occurs at 30 fsw, bring the divers up 10 fsw and shift to air to reduce the partialpressure of oxygen. Shift the console as the divers are traveling to 20 fsw Ventilate both divers with air upon arrival at 20 fsw. Ventilate the affected diver first. Complete the decompression on air at 20 fsw. Compute the 20-fsw stop time as follows: Multiply the missed stop time on oxygen at 30 fsw by the ratio of the air to oxygen stop time at 30 fsw to obtain the equivalent missed air time at 30 fsw. Add this time to the 20-fsw air stop time shown in the Air Decompression Table.
3. If a recompression chamber is not available on the dive station and the event occurs at 20 fsw, shift the console to air, ventilate both divers, affected diver first, and complete the decompression in the water at 20 fsw on air. Compute the remaining stop time on air at 20 fsw by multiplying the remaining stop time on oxygen at 20 fsw by the ratio of the air stop time to the oxygen time at 20 fsw.
36
**Oxygen Convulsion at the 30- or 20-fsw Water Stop**
1. Shift both divers to air if this action has not already been taken.
2. Have the unaffected diver ventilate himself and then ventilate the stricken diver.
3. If only one diver is in the water, launch the standby diver immediately and have him ventilate the stricken diver.
4. Hold the divers at depth until the tonic-clonic phase of the convulsion has subsided. The tonic-clonic phase of a convulsion generally lasts 1–2 minutes.
5. At the end of the tonic-clonic phase, have the dive partner or standby diver ascertain whether the diver is breathing. The presence or absence of breath sounds will usually be audible over the diver communication system.
6. If the diver appears not to be breathing, have the dive partner or standby diver attempt to reposition the head to open the airway. Airway obstruction will be the most common reason why an unconscious diver fails to breathe.
7. If the diver is breathing, hold him at depth until he is stable, then surface decompress. Compute the number of chamber oxygen periods required by multiplying the remaining oxygen time at the stops by 1.1, dividing the total by 30 min, then rounding the result up to the next highest half period. One half period (15 minutes at 50 fsw) is the minimum requirement.
8. If surface decompression is not feasible, continue decompression on air in the water. Compute the remaining stop time on air at the depth of the incident by multiplying the remaining stop time on oxygen at that depth by the ratio of the air stop time to the oxygen time at that depth. If the shift to air occurs at 30 fsw, compute the remaining stop time on air at 30 fsw, then take the full 20-fsw air stop as prescribed in the Air Decompression Table.
9. If it is not possible to verify that the affected diver is breathing, leave the unaffected diver at the stop to complete decompression, and surface the affected diver and the standby diver at 30 fsw/min. The standby diver should attempt to maintain an open airway on the stricken diver during ascent. On the surface, the affected diver should receive any necessary airway support and be immediately recompressed and treated for arterial gas embolism in accordance with Figure 17-1.
37
**CNS Oxygen Toxicity in the Chamber**
1. Remove the mask.
2. After all symptoms have completely subsided, decompress 10 feet at a rate of fsw/min. For a convulsion, begin travel when the patient is fully relaxed and breathing normally.
3. Resume oxygen breathing at the shallower depth at the point of schedule interruption.
4. If another oxygen symptom occurs after ascending 10 fsw, complete decompression on chamber air. Compute the remaining chamber time on ai. If the diver is at 40 fsw, allocate 10% of the remaining air time to the 40-fsw stop, 20% to the 30-fsw stop, and 70% to the 20-fsw stop. If the diver is at 30 fsw, allocate 30% of the remaining time to the 30-fsw stop and 70% to the 20-fsw stop. Round the stop times to the nearest
whole minute. Surface the divers upon completion of the 20-fsw stop.
38
**Management of Asymptomatic Omitted Decompression**
39
**Decompression Sickness During the Surface Interval**
If symptoms of Type I decompression sickness occur during travel from 40 fsw to the surface during surface decompression or during the surface undress phase
* Compress the diver to 50 fsw following normal surface decompression procedures. Delay neurological exam until the diver reaches the 50-fsw stop and is on oxygen.
* If Type I symptoms resolve during the 15 minute 50-fsw stop, the surface interval was 5 minutes or less, and no neurological signs are found, increase the 50 fsw oxygen time from 15 to 30 minutes as outlined above, then continue normal decompression for the schedule of the dive.
* Ascend from 50 to 40 fsw during the subsequent air break.
40
**Decompression Sickness During the Surface Interval**
If Type I symptoms do not resolve during the 15 minute 50-fsw stop or symptoms resolve but the surface interval was greater than 5 minutes
Compress the diver to 60 fsw on oxygen. Treat the diver on *Treatment Table 5* if the original schedule required 2 or fewer oxygen periods in the chamber. Treat the diver on *Treatment Table 6* if the original schedule required 2.5 or more oxygen periods in the chamber. Treatment table time starts upon arrival at 60 fsw.
41
**Decompression Sickness During the Surface Interval**
If symptoms of Type II decompression sickness occur during travel from 40 fsw to the surface, during the surface undress phase, or the neurological examination at 50 fsw is abnormal
Compress the diver to 60 fsw on oxygen. Treat the diver on *Treatment Table 6.* Treatment table time starts upon arrival at 60 fsw.
42
If surface interval is less than or equal to 7 Minutes on SurDe
* Increase the time on oxygenat 50 fsw from 15 minutes to 30 mminutes
* Ascend to 40 fsw during the subsequent air break
43
**Diving at Altitude**
What altitudes needs corrections?
* 0 - 300 ft No corrections
* 300 - 1,000 ft dives deeper than 145 fsw
* 1,000 - above ALL Dives
44
Diving at Altitude
How long does it take to acclimate
12 Hours
45
What is considered warm water diving
Greater than 88\*F
46
What tempature is cold water diving
37\*F and colder
47
What is the preferred line for Cold water/Ice Diving
Polypropylene
48
Ultrasonic sonar may be operated at a range of what from a diver?
10 yards
49
What are some typical support crafts
* Auxiliary Rescue/Salvage Ship (T-ATRs)
* Ocean Tug (T-ATF)
* Diving Tender (YDT)
* Submarine Tender (AS)
* Small Craft
