Scuba 1.0 Flashcards
(86 cards)
1
Q
Normal Working
A
130
2
Q
Dives deeper than 130 require what?
A
CO/OIC Approval
3
Q
Max Working Limit?
A
190
4
Q
Can you perform deco dives?
A
Yes with CO/OIC approval
5
Q
What are the requirements for designation as DOD civilian diver?
A
DOD employee who has been trained at approve US Navy Diving School
6
Q
Max depth for civilian DOD diver?
A
130
7
Q
Requirements for Civilian DOD scuba dive?
A
- Max 130 feet
- Deco chamber within 5 minutes for any dive deeper than 100 (or outside no-deco limits)
- Manual j valve reserve or independent reserve cylyinder with separate regulator
- submersible pressure guage worn by every diver
- DOD civilians must remain at location of reco chamber for 1 hour after surfacing for dives requiring chamber to be within 5 minutes
8
Q
When are civilian divers waived from the stringent OSHA requirements
A
When conducting unique military operations with CO designation letter
9
Q
Min Equipment for Scuba
A
OWLD - FSSD
O - open circuit scuba with pressure gauge
W - weight
L - life preserver/BC
D - Dive Knife
F - face mask
S - swim fins
S - submersible watch
D - depth gauge
10
Q
What is the max current?
A
1 knot
11
Q
What is required if current is greater than max?
A
- ORM analysis
- Tended or witness float
12
Q
Minimum manning for single diver
A
4 (sup may use 1 non-diver tender)
- Dive Sup
- Diver
- Diver Tender
- Standby Diver
13
Q
Who tends the Standby diver in minimum manning?
A
Supervisor
14
Q
Who maintains logs in minimum manning?
A
Supervisor
15
Q
Minimum manning for Buddy Pair?
A
4
- Dive Sup
- 2 Divers
- Standby Diver
16
Q
What is the single greatest practice in Navy SCUBA operations?
A
Buddy System
17
Q
Standby Diver Shall:
A
- Be fully prepared
- Be equipped with octopus
- Receive same briefing
- Remain fully aware
- Stay informed
- Be outfitted with equivalent or greater diving dress
18
Q
Minimum temperature for Scuba Operations, before it’s considered Ice Diving?
A
38F
18
Q
What are the concerns of exceptional exposure dives?
A
DCS and CNS O2 Tox
18
Q
Limiting factors of Scuba?
A
- Increased air consumption due to depth
- Nitrogen narcosis
- Environmental Exposure
19
Q
What is Scuba primarily used for?
A
- Shallow water search and inspection
- Light repair and recovery
20
Q
Dive Sup Responsibilities
A
- Overall In charge
- Conduct ORM
- Part of mission planning
- Recognize unsafe conditions
21
Q
Tender Responsibilities?
A
- CPR, First AID
- Assist Diver
- Line Pull signals
- Track bubble trail
- Observe for unsafe conditions
- Observe witness float
22
Q
How often do you signal the divers with a line-pull?
A
Every 2-3 minutes
23
What type of system does scuba employ when breathing?
Demand
24
Basic Components of scuba
* Cylinder/Cylinders
* Cylinder valve and manifold assembly
* Demand Regulator assembly
* Harness
25
What type of pressure is the hose going to the secondary stage regulator?
Low Pressure (INTERMEDIATE HOSE)
26
What is intermediate pressure?
* Primary regulator is the cause of this by reducing high pressure from the cylinder
* Overbottom pressure (over ambient pressure)
27
Cylinder material type?
DOT approved steel or aluminum
28
When must scuba cylinders be inspected?
* Every 12 months
* If water or particulate enters the cylinder
29
What type cylinders do we use?
Alluminum 100, 3300 working pressure with .47 cu.ft.
30
What is the burst disc pressure rating?
10% over max cylinder pressure
31
What must BCs Do?
* Provide min 10 pounds of positive buoyancy at max depth
* Jettisonable weights
* Power inflator
* Oral inflator
* OPRV
32
3 types of lifelines>
* Tending Line
* Buddy Line
* Float Line
33
When is a tending line required?
* For standby
* Single Diver
* When direct access to surface is not available
34
When can a float line be used?
Only when direct access to the surface is available
35
Minimum size of float line surface float?
11 inches, brightly colored
36
What is the separation of a buddy line?
6-10 feet
37
When should you use a buddy line?
Low vis or at night
38
Materials for lifelines?
*Nylon
*Dacron
*Polypropylene
39
What is the minimum capacity for an independent air source?
19 scf
40
Percent in diver's breathing air?
20-22%
41
What does duration of air supply depend on>
* Consumption rate
* Depth
* Cylinder capacity
* Delta Temperature
42
What is the first step for air supply duration calc?
Consumption Rate
CR= ATA x RMV
43
Second Step of air supply calc?
Available Air Capacity of Cylinder
AC = (Delta P)/14.7 x FV X N
44
Third step of air supply calc?
Duration of Air Capacity
Duration = AC/CR
45
What are scuba high pressure charging lines rated to?
3,000 psi
5,000 psi
46
What is the fastest and most efficient way of charging scuba bottles?
Cascading
47
How is woking pressure of a hose determined?
1/4 burst pressure
48
What are strain reliefs made of?
* Cable
* Chain
*21-thread
*3/8in nylon married every 18 inches
49
What should marrying cord be?
1/8in nylon or material of equivalent strength
50
Charging rates?
200 dry
400 wet
51
What are you inspecting on air cylinders?
* Ensure o-ring for cylinder valve is present
* gauge cylinders
* inspect exterior and valves IAW PMS
52
What are you inspecting on harness?
* Wear and tear on straps and rest of harness
53
What are you inspecting on hoses?
* cracks, punctures
* check fittings for tightness
54
What are you inspecting on regulator?
* Check over bottom
* Check for leaks
55
What are you inspecting on BC?
* Orally inflate and check for leaks
56
What are you inspecting on mask?
Cracks, wear, seal
57
What are you inspecting on fins
Straps and blades
58
What is on the pre-dive inspection?
* divers are ready
* Minimum equipment
* cylinder pressures and air is sufficient
* quick release buckles easy to reach
* weights installed and easily jettisonable
* bc no constrained and free to expand
* knife
* cylinder fully open and back a 1/4
* Hose air passing over right shoulder
* Check 2nd stage for demand air ease
* Final brief
* Dive signals deployed
59
Max descent speed?
75 fpm
60
What can skip breathing lead to?
Hypercapnia
Unconsciousness
Death
61
What is in the lost diver kit
Clump with line and buoy (min 11 inches)
Circling line (min 25 feet)
62
Lost Diver EP for Diver
* Peform 360 search
* Note max depth and bottom time
* Ascend to surface at 30 fpm with 4 tap intervals on tank
* Continue 360 as ascending
* Inflate BC and notify Dive Sup of depth, bottom time and air remaining
63
Lost Diver EP for Sup
* Sound recall and post lookouts
* Lower lost diver clump and buoy at last know location
* Initiate search down clump with surfaced diver or standby diver (depended on air remaining and deco status)
* Activate EAP
* Gather additional resources (coastal security)
* Continue search
64
Trapped Diver EP for Diver
* Remain calm
* Assess the situation
* Carefully work the problem but don't become part of the problem
* Utilize line pull signals if necessary
* Verify rig vitals and what is needed
* Attach tending line to trapped diver
* If necessary, remove from rig and buddy breathe up
65
Trapped Diver EP for Supervisor
* Have tools ready (consider sending extra bottle with reg down)
* Ask surfaced buddy trapped diver's status and rig vitals.
* Ask what he needs
* Make recommendations
* Ask about surfaced buddy's ascent, max depth, and bottom time. Ensure No-D
* Launch Stdby if needed or current diver
66
Loss of Air EP for diver
* Check air source and verify valves
* Switch regulators
* Abort and buddy breathe
67
Unconscious Diver EP for Diver
* Assess
* Reg out, keep out
* Maintain airway
* Check cylinder open
* Ditch weights as needed and bring to surface
* Inflate affected divers BC as needed
* Fully inflate on surface
68
Unconscious Diver EP for Supervisor
* All divers inflate BCs
* maintain airway
* Assess breathing and 5 rescue breaths if not
* Extract
* Provide BLS
* Transport and implement EAP
69
Ascent rate
30 fpm
70
What exception is there to the rule for tending line needed when no direct access to the surface?
EOD searches for Limpet mines but must be used for training
71
When is decompression diving allowed for scuba?
* Only when absolutely necessary
* Needs CO or OIC approval
72
How long must divers remain in the vicinity?
2 hours after surfacing within a 30 min drive
73
Ascent rate from 40 Foot stop to surface?
40 fpm
74
Uncontrolled ascent with no symptoms?
* Neuro
* Observe for 1 hour
75
Asymptomatic diver surfaces with 20/30 foot stop missed, what are your options?
* SI Less than 1 minute - go back down and increase stop time by 1 min
* SI 1-7 minutes - (>5 minutes increase O2 time at 50 from :15 to :30)
* SI >7 minutes - TT5 for 2 or fewer, TT6 >2
* If not chamber, return to stop and multiply 30 and 20 foot stops by 1.5
76
Asymptomatic diver surfaces >30 foot stop missed, what should you do?
TT6
If no chamber, go to first stop and follow schedule all the way to 30 foot stop. Then multiply 30 and 20 foot stops by 1.5
77
What is the SI for surface decompression?
Time from leaving first stop to arriving in the chamber
78
What is the recompression rate in the chamber for surface decompression (NOT Treatment TABLE)
100 fpm
79
What should you do for surface intervals >5 but less than 7?
Increase O2 time at 50 from :15 to :30
80
What do you do if a diver missed a stop deeper than 50?
165, TT6A
81
Line pull 5?
send a line
82
Lne pull 1-2-3
send a square mark
83
line pull 2-1-2
send a slate
84
