If you or your dive buddy have a dive emergency

Signal you buddy
Give 4 come to surface
Surface under buoy
Inflate your life vest
Close & remove DSV
Day use hand n arm signals
Night crack red chem light

Symptoms of rig flooding/causing cocktail and chemical injury

Increase Breathing resistance
Gurgling sounds
Bitter taste
Possible gas escaping
If alkaline solution swallowed chemical injury

Actions for rig flooding

Assume upright pos
Manual bypass as needed
Signal buddy
Ascend norm, exhale nose
Maintain vertical pos
Bypass as needed
Inflate life vest
Close & remove DSV
Signal for assistance
Rinse mouth several times

Symptoms of demand/ bypass valve stuck open

Increased exhalation resistance
Overfilled breathing bag
Noise from demand valve activation

Actions for demand/ bypass valve stuck open

Depress manual bypass knob
Signal dive buddy
Ascend normally exhale nose
On surface inflate life vest
Close 02 supply
Close & remove DSV
Signal for assistance

Symptoms of breathing gas deficiency

Breathing resistance
Deflation of the breathing bag

Actions for breathing gas deficiency

Ensure 02 cylinder valve open
Check gauge
Depress manual bypass
Signal dive buddy
Ascend normally exhale nose
Inflate life vest on surface
Close and remove DSV
Signal for assistance

Symptoms of demand/ bypass valve failure

Demand valve fails to supply O2 to the breathing loop

Actions for demand/ bypass valve failure

Depress Manual bypass
Signal to dive buddy
Ascend normally exhale nose
On surface inflate vest
Close & remove DSV
Signal for assistance

Actions for O2 tox-management of non convulsions

Signal dive buddy
Abort the dive
Controlled ascent
Exhale through nose
On surface inflate vest
Close & remove DSV
Signal for assistance
Watch for off effect

Actions for O2 tox-management for convulsive diver

Position behind casualty
Grab victim on chest
Make victim upright
Leave mouthpiece in
Try n close DSV if time
Controlled ascent press chest
Head tilted back
Add air to victim vest if needed
Take belt of if needed
Don't release your belt
On surface inflate

Divers actions for hypoxia

Add O2 to divers UBA
Bring victim to surface
Controlled ascent breathing nose
On surface inflate his then yours
Close and remove DSV
Have victim breath fresh air
Signal for assistance

Actions for an unconscious diver

Add O2 to divers UBA
Position behind casualty
Grab victim on chest
Make victim upright
Leave mouthpiece in
Try n close DSV if time
Controlled ascent press chest
Head tilted back
Add air to victim vest if needed
Take belt of if needed
Don't release your be

Divers actions for CO2 buildup (hypercapnia)

Slow down work rate
Ventilate rig by
Inhale mouth exhale nose
Until u hear Lung demand valve actuate
Manual bypass 4-6 sec
Breath through mouth exhale through mouth
Ventilation completed
Abort dive if symptoms persist

Lost swimmer procedures

Stop do visual 360
Note depth and time
Controlled ascent breath nose
Take 3 point reference
360 search on surface
On surface inflate vest
Close & remove DSV
Signal for assistance

Trapped diver

Attempt to free victim
Check victim O2 supply
Check if breathing
Attach buoy/ tending line to trapped diver and follow buoy
Tell dive sup tools needed
If both trapped give 2-2-2

Actions for hypothermia

Signal dive buddy
controlled ascent breath nose
On surface inflate vest
Close and remove DSV
Signal for assistance

Symptoms of AGE

Dizziness
Weakness
Numbness
Tingling
Lack of coordination
Blindness

Symptoms of O2 toxicity

Visual blurred
Ears ringing
Nausea
Twitching
Tingling
Irritability
Dizziness
Convulsions

Symptoms of hypoxia

Dizziness
Drowsiness
Weakness
Unconsciousness
Mental confusion
Lack of coordination

Symptoms of hypercapnia

Headache
Nausea
Confusion
Unconsciousness
Increased breathing rate
Labored breathing

Causes of hypoxia

Improper purge
To much N2
Too low PPO2

Hyperthermia

Mild:
uncontrolled shivering
Slurred speech
Imbalance
Poor judgment
Severe:
Loss of shivering
Impaired mental status
Irregular heart beat or very shallow pulse

Hypothermia treatment

Passive:
Remove from environment
Remove wet clothing
Wrap warming blanket
Active:
Warm shower or bath
Place in want place

Disadvantages of diving MK25

CNS O2 toxicity
Limited shallow depths
No voice comm
Limited thermal protection
No reserve

Advantages of mk25

Stealth
Extended operation duration
Minimum support
Portability
Excellent mobility

Max full capacity of mk25 O2 cylinder

207 bar
3000 psig

Max fill rate for O2 cylinder

200 psig per min
13.8 bar per min

Two chambers of the soda lime canister

Moisture trap
Absorbent chamber

How much water is the moisture trap designed to hold in CC

200CC

What component removes moisture and carbon dioxide from breathing loop

Soda lime canister

What controls the direction of the gas flow for inhale and exhale hoses

One way valve

List 3 subsystems

Pneumatic
Recirculation
Equipment housing/ harness subsystem

02 cylinder must be hydrostatically tested every

5 years

What is the function of the demand valve

Adds 02 to the breathing bag as required when the breathing bag is emptied on inhalation

What is the function of the manual bypass knob

Allows O2 to be added manually to the breathing bag

An connecting line runs to what two components

Oxygen reducer
Demand valve

What is the function of the safety cord

Helps secure the breathing bag to the equipment housing and prevents the bag from rising up on the divers chest

What component acts as a flexible had reservoir and helps provide neutral buoyancy

Breathing bag

At 50fsw what is the lifting force of the secular life preserver with minimum cylinder pressure

35 lbs

What is the min operational capacity of the life preserver in air cylinder

2400 psig

3 functions of the multipurpose valve

Oral inflation
Manual deflation
Over pressurization relief

4 types of absorbent mesh

High performance sodasorb 4-8 NI
Sofnolime 4-8 NI
Sofnolime 8-12 NI
DiveSorb Pro 5-8 NI

3 ways inhalation hose can be identified

2 female connectors
White Teflon ring
Shorter than exhalation hose

3 ways exhalation hose can be identified

Red ring on female connector
Bayonet fitting
Longer than the inhalation

Maximum total time on O2

:240

Standard swim speed for turtle backing

:4 per 100 yards
.74 knots

4 actions that must be avoided while conducting a purge

Exhaling back into bag
Under inflation
Lack of room to expand bag
Breaking seal of mask on surface

When is predive and surface purges conducted

Prior to going subsurface or performed either on predive or before a surface transit

When is a emergency purge conducted

Performed when compromised/ enemy contact

What do canister duration and oxygen supply directly affect

Operational duration

Gas loss and mea bloc consumption affect

Oxygen supply

Water temp and exercise rate and mesh size effects

Canister duration

Max transition depth on a TWE

20fsw

TWE limits

21-40fsw :15
41-50fsw :05

What are the SDL requirements

25-:240
30-:80
35-:25
40-:15
50-:10

Recommended swim speed

.8-1 knot

Absorbent types

High performance sodasorb 4-8NI
Sofnolime 4-8 NI
Sofonolime 8-12NI
DiveSorb Pro 5-8