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SCUBA Sup > Various > Flashcards

Various Flashcards

1
Q

What is considered an exceptional exposure dive?

A

Dives deepers than 190fsw
Dives with in-water Deco longer than 90min.
SurDO2 with more than 4 O2 periods.

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2
Q

MK20 Temperature Limit

A

29 degrees and warmer.

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3
Q

Diving in water above ___ should not be attempted without first contacting NAVSEA 00C.

A

99 degrees F

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4
Q

Thermal protection is usually needed below ___ degrees.

A

80 degrees F

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5
Q

Warm water limitations?

A

Temps above 88 degrees.
500ml of fluid 2hr before diving
500ml of glucose/electrolyte beverage for each hour of diving.
Rest/Keep cool for 12 hours before repeat exposure.

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6
Q

Diver will become chilled in water below ____ degrees.

A

70

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7
Q

Three approved CWID configurations?

A

1: Two cylinders w/ separate manifolds (K/J valve)
2: Two cylinders with independent regulators and connected isolation valve (CG CWID)
3: Interspiro DP system.

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8
Q

RCC Level 1
(Note 1, 2, 5)

A

A U.S. Navy Certified RCC close enough to the dive side to support surface decompression with a surface interval of 5 min.
Note 1: The CO may authorize an extension of the SI to max 7min.
Note 2: A non-US Navy chamber may be used if authorized in writing by the first flag officer, it must include NAVSEA 00C hazard analysis.
Note 5: Utilizing a non-Navy chamber will require treatment to be completed IAW host facility.

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9
Q

RCC Level II
(Note 2,5)

A

A U.S. Navy certified recompression chamber accessible within 1 hour of the casualty.
Note 2: A Non-U.S Navy Chamber may be used if authorized in writing by the first flag officer.
Note 5: Utilizing a non-Navy chamber will require treatment to be completed IAW host facility.

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10
Q

RCC Level III
(Note 3,4,5)

A

A U.S. Navy certified recompression chamber accessible within six hours if the casualty.
Note 3: A non-US Navy chamber may be used if it is evaluated utilizing the NAVSEA non-Navy recompression chamber check sheet and authorized in writing by the CO.
Note 5: Utilizing a non-Navy chamber will require treatment to be completed IAW host facility.

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11
Q

What are the OSHA restrictions for DoD divers?

A

Max depth: 130’. Recompression chamber is required when diving deeper than 100fsw or if No-D limit is exceeded.
Manual reserve or separate reserve gas supply.
Submersible PSI gauge.
Must remain at the location of the chamber for 1 hour after surfacing for all dives that require a chamber to be available within 5min.

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12
Q

Shallow water diving table displays depth at what increments?

A

1 foot increments from 30’-50’fsw.

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13
Q

Are DoD civilian divers ever exempt from OSHA regulations?

A

Yes, when conducting uniquely military operations.
CO shall issue a designation letter where applicable.

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14
Q

Safety burst discs must be rated at what percent over max cylinder pressure?

A

10%

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15
Q

What are the parts of “In-water” checks?

A

Self-breathing check.
Check partners equipment for leaks.
Check partner for loose/entangled straps.
Check buoyancy and orient position.

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16
Q

When performing air calculations, what factors influence consumption rate?

A

Water temp/Thermal protection.
Current and visibility.
Nature of task.
Physical fitness.
Diver’s experience.

17
Q

Cat 4 water: What is the definition of baseline contamination?

A

Water considered “sufficient” or better under the EPA 2012 Recreational Water Quality Criteria.
Is used monthly or more often and not known to pose a risk to divers.
Open water, that is at least 400yards away from any river/open pipeline outfall, harbor-mouth, or inland waterway.

18
Q

Bouyancy compensators SHALL at a minimum…

A

Have min 10lbs lift at max depth.
Have Jettison-able weights, a power inflator with oral inflation, and an OPV.

19
Q

Category 1 water?

A

Grossly Contaminated

20
Q

Category 2 water?

A

Heavily contaminated.

21
Q

Category 3 water?

A

Moderately contaminated.

22
Q

The rate of descent for a diver shall never exceed what rate?

A

75 feet per min.

23
Q

What is Boyle’s Law?

A

At a constant temperature, the absolute pressure and the volume of gas are inversely proportional.

24
Q

What is Charles’/Gay-Lussac’s Law?

A

At a constant pressure, the volume of a gas is directly proportional to the change in absolute temperature.

25
Q

What is Dalton’s Law?

A

The total pressure exerted by a mixture of gases is equal to the sum of the pressures of each of the different gases making up the mixture, with each gas acting as if it alone were present and occupied the total volume.

26
Q

What is Henry’s Law?

A

The amount of any given gas that will dissolve in a liquid at a given temperature is directly proportional to the partial pressure of that gas.

27
Q

All craft used for diving operations shall:

A

Be seaworthy.
Include Coast Guard required lifesaving/safety gear.
Have a reliable engine.
Provide ample room for the divers to dress.
Be able to carry all diving safety equipment required.
Have a well trained crew.
Have SOP required equipment.

28
Q

Three “ata” is equal to how many feet of water?

A

66fsw

29
Q

What are the 3 principal applications of SCUBA?

A

Shallow water search, inspection, light repair and recovery.

30
Q

Chapter 7 of the USN Dive Manual covers ______ in operations ____ degrees and above.

A

38

31
Q

How are SCUBA Tenders are responsible for tracking the location of divers?

A

Bubble trail, dive float or marker, strobe light/pinger.

32
Q

How do you calculate hydrostatic pressure?

A

Multiply the depth by .445

33
Q

The pressure resulting from the weight of the water column is referred to as what?

A

Hydrostatic Pressure.

34
Q

_______ can give a feeling of false security, leading to an increased risk of drowning.

A

Over confidence.

35
Q

During CWID, if a regulator is allowed to free flow, how long before it freezes?

A

If allowed to free flow the regulator can freeze in as little as 5 seconds.

36
Q

Post-dive timeline requirement for AAR?

A

AAR shall be released via C2OIX within 10 days following the mission.

37
Q

Define Situational Awareness?

A

A detection of the elements in the environment within a volume of space and time. Good SA is the presence of mind to interprete those elements and project their status in the near future, to aid decision making.

38
Q

Hazards and near-mishaps that don’t warrant a SIREP are reported as _____. What are some examples?

A

HAZREP.
Aborted dive due to unexpected issue.
Trapped/fouled diver.
Lost diver if stby is deployed.
Exceeding prescribed limits (i.e. planned BT)
Exhaust valve installed improperly!
Tags cleared without authorization.

SCUBA Sup (5 decks)

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