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Dive Medicine > SCUBA > Flashcards

SCUBA Flashcards

1
Q

what is the normal working limit for SCUBA?

what is the MAX working limit?

A

130 fsw

190 fsw w/CO or OIC approval

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2
Q

What are the applications for SCUBA? (3)

A

shallow water searching
inspections
light repair and recovery

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3
Q

what is the current restriction for SCUBA?

A

1 knot MAX

*greater than 1 requires ORM analysis - may be approved with buoy tied to diver

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4
Q

In areas with strong currents, schedule work during?

A

slack water (between tides)

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5
Q

what is the volume/working pressure for

  • steel 72’s?
  • aluminum 80’s?
A
  1. 7 scf/2250 psig

81. 85 scf/3000 psig

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6
Q

How often are cylinders inspected?

A

5 years pressure test
annually, visual

or if ever at ZERO

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7
Q

Which valve contains a reserve mechanism,?

A

J-valve (as opposed to K-valve)

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8
Q

Below what temperature is wet suit thermal protection recommended for SCUBA?

what about dry suit?

A

80F

40F

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9
Q

What are the minimum manning requirements for SCUBA operation?

A 
4:
Dive SUP
Diver
Dive Tender (or Buddy Diver)
Standby Diver
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10
Q

What line pull signal is never answered?

A

444

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11
Q

How often should a tender signal a diver?

A

every 2-3 minutes

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12
Q 
From Tender to Diver:
1
2
3
4
2-1
A 
1 - are you alright? (on ascent, stop)
2 - going down (on ascent, go back down)
3 - standby to come up
4 - come up
2-1 I understand or talk to me
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13
Q 
From Diver to Tender
1
2
3
4
2-1
A 
1 - I am alright (on descent, stop)
2 - lower or give me slack
3 - take up slack
4 - haul me up
2-1 I undesrtand or talk to me
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14
Q

Special Signals
1-2-3
5
2-1-2

A

send me a square mark
send me a line
send me a slate

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15
Q

Emergency
2-2-2
4-4-4

A

I am fouled and need assistance

Haul me up immediately

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16
Q 
Searching Signals (without circling line)
7
1
2
3
4
A

7 - go on (or off) searching signals
1 - stop and search where you are
2 - move away from tender if given slack, move toward tender if strain is taken
3 - face umbilical, take strain, move right
4 - face umbilical, take strain, move left

17
Q 
Searching Signals (with circling line)
7
1
2
3
4
A 
7 - go on (or off) searching signals
1 - stop and search where you are
2 - move away from the weight
3 - face weight, go right
4 - face weight, go left
18
Q

What are reasons for an emergency free ascent?

what are the EPs?

A

fouled equipment
loss of air
incap/uncon diver

drop all tools 
ditch weight belt
inflate BC
only ditch SCUBA if absolutely necessary
exhale continuously to surface with head back and airway open - watch for overhead obstructions
notify dive sup immediately
19
Q

EP for trapped diver (7)

A
  1. approach with caution
  2. assess area for safety
  3. assess diver
  4. is diver injured?
  5. does diver have air and how much?
  6. what will it take to free diver?
  7. return to surface and report to Dive Sup
20
Q

EP for injured diver (4)

A
  1. approach with caution
  2. assess area for safety
  3. stabilize injury as best you can and ascend to surface at 30fpm
  4. once at suface start BTLS and notify dive sup
21
Q

EP for loss of air (5)

A
  1. notify buddy
  2. check air supply (air on, back 1/4 turn)
  3. check reserve
  4. try 2ndary reg (octopus) or other air source if available
  5. buddy breathe and abort dive
22
Q

What are reasons for unconscious diver? (5_

A 
CO tox
CO2 tox
N2 narc
entrapment/injury
disorientation/poor visibility
23
Q

EP for unconscious diver

A
  1. approach with caution
  2. open airway in [INSERT REG?]
  3. ensure cylinder valve is on, check air/reserve
  4. ensure open airway
  5. 444
  6. ascend - holding airway open and pressing on chest
  7. when both heads above surface - fully inflate BC and keep head above water
  8. yell help and report to dive sup including vitals/tank pressure
24
Q

EP for lost diver (3)

A
  1. Make 360 turn looking for bubbles (note max depth and bottom time)
  2. ascend, looking for bubbles (if found, follow down to lost diver)
  3. on surface notify dive sup
25
Q

what are the dry and wet SCUBA charging rates?

what is the minimum pressure differential for driving force?

A

400 psig max wet
200 psig max dry

50 PSIG

Dive Medicine (10 decks)

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