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Chambers & Hyperbaric Evacuation Flashcards

(59 cards)

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1
Q

What is the minimum allowable diameter of a DDC and saturation chamber

A

1500mm for DDC
1800mm for Sat

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2
Q

Chamber view ports must be changed out every 10 years from date of

A

Manufacture

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3
Q

Depth gauge and analysis lines are usually;
Small bore or Large bore

A

Small bore plumbing

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4
Q

Only treatment mix is connected to sat BIBS.
True or False

A

False
Bottom mix is the one online.
Treatment mix will be available.

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5
Q

BIBS masks and plumbing should be 02 clean
True or False

A

True

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6
Q

Hull penetrators should have what on both sides?

A

Valves.

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7
Q

Soda sorb is more effective when damp or dry?

A

Damp (not wet)

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8
Q

With regards to the saturation complex; communications should be in what locations?

A

Chambers
Medical and equipment locks
Dive control
Gas room

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9
Q

There needs to be a video feed in every saturation chamber
True or False

A

True

Also at medical and equipment locks and the bell trunking

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10
Q

Each chamber requires its own panel and gauge set?
True or False

A

True

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11
Q

Manual O2 add systems should have at least how many in-line valves?

A

2 valves.

Never take your hand off when adding O2

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12
Q

BIBS require how many hours of supply at the deepest storage depth?

A

4hrs per person

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13
Q

What are the minimum gas requirements for saturation diving.

A

Enough gas to press the system to make storage depth. Plus same in reserve.

Enough O2 for metabolic consumption and maintaining ppO2 on deco, Doubled.

3 weeks reserve supply of cal gas

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14
Q

Chamber cleaning and bedding changes should happen every how many days?

A

Every 3 days

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15
Q

Gas must be sampled from what points before it is put online?

A

At the quad and at the panel.

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16
Q

State the precautions to take when blowing down on a non breathable mix.

A

Divers don BIBS for at least the first 10m
Pressurization stopped at 1-3m for leak check

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17
Q

State chamber environmental parameters

A

Oxygen 350-500mb
CO2 < 5mb (0.005ata)
Nitrogen < 1000mb (1ata)
Temp 25-33 as per diver comfort
Humidity 50-70%
Depth within 0.3m or 1ft of specified depth

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18
Q

Chamber environmental checks should be recorded every…

A

1 hour

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19
Q

After deco, medicals are required and no work for at least 12hrs
True or False

A

True

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20
Q

Decompression can be initiated by an upward excursion
True or False

A

False

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21
Q

Upward excursion is based on the deepest depth obtained in the last 12hrs
True or False

A

False.
Upward excursion limits are based on deepest depth obtained in the previous 24hrs

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22
Q

Loss of chamber pressure may cause which physiological problems?

A

Decompression sickness
Barotrauma
Hypoxia

Don BIBS and or exit the chamber ASAP

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23
Q

Methods to maintain parameters if ECU’s fail

A

Lung powered scrubbers
Minimize shower use
Ice packs
More blankets

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24
Q

BA sets must be available in both Dive and Sat Control
True or False

Study These Flashcards
A

True

During a fire in the chamber control room, LST will don AGA, attempt to fight the fire and transfer divers to the HRU

25
Minimum internal sat chamber diameter is
1.8m or 6ft
26
Each sat system requires an area where medical treatment can take place. State some of the areas requirements;
Bunk should be waist high Ability to tilt patient 30degrees both at head and feet IV drip hook Medical lock at least 300mm diameter Sufficient lighting Gas treatment Electrical hull penetrators Comms unit
27
An ECU removes humidity by what process?
Condensation
28
What is the purpose of prophylactic ear drops?
To help prevent ear infections
29
State the main hazard of split level saturation’s
Leaking gas through o-ring or cross over valves causing an unbreathable atmosphere
30
BIBS supply external valves should be kept in which position
Open
31
Minimum life support time in hours for an HRU
72hrs. CO2 scrubbing, gas, environmental controls, heating/chilling
32
Markings for an HRU must b shown from at least how many locations?
Markings on 3 locations while floating
33
Explain each of the 4 stages of an operational emergency procedure for launching an HRU
Phase A; Transfer divers to the HRU and ready launch. (max 15mins) Phase B; Launch HRU and be 100m from the vessel being evacuated. (max 30min from command to launch) Phase C; transit of HRU to reception site. (Arrive within 75% of HRU endurance) *safe haven is where the HRU arrives on completion of transit Phase D; Safe decompression of divers (In HRU, SPHL, or using LSP in HRF)
34
State some medical issues that may arise while in the SPHL
Motion sickness Thermal imbalance too hot or too cold Metabolic and bodily waste puke and shit InSufficient CO2 scrubbing material Contaminates
35
State some hyperbaric evacuation concerns
Injures or other phsiological issues Actually being able to evacuate from your living chamber Transit time to safe haven Weather conditions
36
Publications for guidance on hyperbaric evacuation systems
IMCA D053
37
HRU rescue drills shall be conducted when
Prior to pressing into Sat and every 14 days there after
38
The HRU should have a practice deployment and recovery how often?
Every 6 months
39
Under extreme circumstances Accelerated emergency decompression is permissible
Yes, under extreme circumstances. Seek guidance.
40
3 typical ways of launching the HRU/HRC
Davit launch Winch/push/pull/ramp Dedicated crane *Primary power source must be from stored energy *Launch system must be compliant with; SOLAS/ IMO/ IMCA guidelines
41
Main 2 items on a HRU/HRF Audit are;
Hardware/Equipment Documentation
42
The LSP should include the following services;
Power Gas Heating and Cooling Toilet facility
43
PVHO should undergo visual int/ext inspection plus gas leaks test to full working pressure, how often?
Every 2.5 years Visual examination 6 monthly Overpressure test 5 years
44
A DDC must have an internal over pressure test plus a gas leak test at maximum working pressure, how often?
Every 5 years Visual examination 6 monthly Int/ext visual plus leak test at full WP every 2.5 years
45
When oxygen is below this percentage, fire cannot start, regardless of ppO2
6%
46
O2 percentage in chambers should never exceed what %
23%
47
Under IMCA guidelines, all Chambers must be two-compartment. True or False
True
48
When undergoing therapeutic treatment there is no need for an attendant to be inside the chamber. True or False
False. A chamber attendant is required during treatment.
49
Under IMCA guidelines, all DDC must be two-compartment. True or False
True
50
Normal ppO2 range for therapeutic treatments is;
1.6 to 2.8 ppO2
51
When not is use, medical locks are kept at depth. True or False
False. Medical locks should be kept on surface, closed and dogged.
52
Medical lock operating procedures should be kept where?
Directly next to each medical lock.
53
With regards to DDC for air ops, no diving should take place unless...
There is a 2 compartment chamber on site or nearby.
54
What is the minimum amount of O2 required to be kept on site for air dive ops?
90m3 kept in reserve.
55
What is the maximum ppO2 via BIBS in the chamber?
2.8bar
56
Are dummy trunk sections similar to those of your own SPHL allowed to be used in mating trials?
No, actual physical mating trials need to happen and can help identify any issues in advance of an actual emergency.
57
Whats your first actions if you have a fire in sat?
Don BIBS, notify sat control, attempt to extinguish
58
You are the sup and there is sudden loss of pressure when guys moving from entry lock to TUP, whats your first course of action?
Blow down to maintain pressure while the guys get to a secure chamber.
59
Bellman left the o2 inject dumping into the bell amd is going to take an o2 hit, what is your instructions?
Get him to don BIBS and flush the bell and bring the ppo2 back in range

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