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116 Cards in this Set
- Front
- Back
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What are the percentages of gasses used when diving to 300'
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88% He
12% O2 |
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At what depth during an N2O2 dive would you hsave to get a CNO waiver
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Deeper than 150'
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Why are deeper dives considered Exceptional Exposure
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1.Increased breathing resistance
2.CO2 retention 3.Higher risk of CNS O2 tox 4.Higher risk of DCS |
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What manual is supplemental to the Mk-16 mod 1 manual
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USN Dive Manual
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How much training should be conducted at night or in limited visibility
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At least half
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When are wourk-up dives strongly recommended
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for dives greater than 130'
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What are your requirements prior to diving a No D or decompression dive if you haven't dove the Mk-16 in over 6 months
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-OP/EP refamiliarization
-Complete a training dive, No D -Conduct open water decompression training dive |
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The diluent bottle holds how many SCF at what PSIG
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21SCF @ 3000psig
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What 3 things will cause the diluent gas to be depleted rapidly?
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-Mask leaks
-Frequent depth changes -Improper UBA assembly |
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What are the normal and max working limits for N2/O2 and He/O2
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N2O2-150 and 190'
HeO2-300 and 300' |
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At what water temp does the primary concern for canister duration turn into the consideration of the diver's well being
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94 degrees
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When can you switch diluents between dives
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Can't/ Not Authorized
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Permissible 1.3 ata N2O2 dive profiles:
Multiple repet dives from ____provided all the dives are no D dives |
0-150'
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Permissible 1.3 ata N2O2 dive profiles:
One D dive from ____fsw plus up to ____ no D dives from 0-150'. |
0-150', three additional
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Permissible 1.3 ata N2O2 dive profiles:
The_____ no D dives may precede, follow, or bracket the D dive |
three
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Permissible 1.3 ata N2O2 dive profiles:
Two D dives (initial D dive plus one repetitive D dive) from 0-150 fsw. Additional_______. |
No D idves are not allowed before or after the D dives.
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Permissible 1.3 ata N2O2 dive profiles:
Repet dives from 151-190'fsw under the rules above providing |
CNO grants a waiver for exceptional exposure diving
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What is the diff b/w Permissible 1.3 ata N2O2 profiles and the same rules for HeO2
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0-150' is 0-200'
151-190' is 201-300' |
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What are the minimum manning requirements for 1 and 2 divers in Mk 16 and what positions do they fill
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Sup-logs/Stdby tender
Diver-1 or 2 Stdby Diver tender |
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One tender per diver except____
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When using a buddy line
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Do you have to have a chase boat for open water dives
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Yes
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When can a supervisor conduct dives without a buddy line
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Situations where use is not feasible (i.e. Tending diving)
Where use will pose a greater hazard |
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How long is a distance line in Feet and Meters? How is it attached
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10' to 81'
3m to 25m secured to each diver |
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Tending lines are made of what and are marked how
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Light line (bouyant)
Red every 50' Black/Yellow every 10' |
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What lines are marked for decompression dives
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Tending lines
Marker lines Lazy shot |
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When can you use a single depth gauge and single watch for 2 divers
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When they are using a buddy line
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How deep is the Mk-4 authorized to when using Mk-16
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200'
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When is a full face mask (FFM) mandatory
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Single diver untended
single marked diver Paired marked diver When using BCD |
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When is a FFM at the diving supervisor's discretion
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Tended diving
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What is the min. amount of fresh water that should be on station for Chemical injury
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2 quarts
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When can stdby be in SCUBA
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Training
Non Influence Diving |
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When does a chamber have to be on site
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Dives deeper than 200'
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Can a single untended diver be used during training
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No
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1 line bull on lazy shot
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Arrived @ lazy shot
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I have started, found, or completed work
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7 pulls
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2-3 pulls
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I have decompression sickness
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Breathing from EBS line pull
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3-2
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Rig malfunciton line pull
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4-2
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Unshackle from lazy shot line pull
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2-1
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I have exceeded the depth of the dive line pull
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5
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The tender receives a 5-3 line pull. What does that mean
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The diver has exceeded the depth by 15'
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max ascent rate and descent rate
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30 fpm and 60 fpm
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How many min. after descent may it take the rig to stop flashing green
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2 to 5 min
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What PPO2 may be temporarily experienced when diving deeper than 200'
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1.6 ata or higher
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When will the Mod 1 transition to 1.3 on descent
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33 fsw
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At what depth during descent should the dive be aborted if there was no transition to 1.3 ata
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40'
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Can you hear the O2 valve operate
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No
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How ofter should you check the secondary
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Every 2 to 3 min.
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How long should you wait with a flashing red at your first decompression stop before instituting EP for low PPO2
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After 4 min.
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Are N2O2 and HeO2 decompression table rules the same
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Yes, but are not interchangeable
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Are RNT group designators for HeO2 and N2O2 tables interchangeable?
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No
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Where is the divers body at in relation to the decompression depth mark
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Chest level
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At what depth is your last D stop and Why
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20' b/c of transition to .7 at 13'
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What is the PPO2 variance for the MK-16 Mod 1
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1.15 to 1.45
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If a diver breathes a PPO2 of ____ for any length of time he will be at a greater risk of developing DCS.
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1.15 PPO2
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What is the minimum depth in which the EBS must be lowered for transition prior to being put 10' below the 1st D stop
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40'
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What is the recommended depth in which to lower EBS and why
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50'
Allows topside personnel to track delays in ascent deeper than 50' |
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For diving above _____ft, the diving supervisor must contact NAVSEA OOC for guidance.
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1000'
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Explain what the ascent procedure below is used for and what procedure would we use here?
12 Hours-No D w/ total BT's w/ less than 2 hours 24 Hours-D, or when No D have cumulative BT of over 2 hours |
1st one is for HeO2 and we would use the standard Ch. 9 table just like SCUBA
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If deeper than____ft and a PPO2 of 1.45 or higher persists w/in the UBA for a period of ______consceutive min. this condition should be treated as a malfunceion of the UBA and appropriate EP's should be followed.
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>20' for 15 conscecutive min.
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For an O2 symptom, is Unusual fatigue a Sx of dizziness?
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Yes
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Why are buddy lines essential to safe closed-circuit oxygen diving
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b/c there may be no warning of an impending convulsion to provide the diver the opportunity to return to the surface
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What are the 3 main steps from the dive manual that should be taken if one of the divers has a non convulsive O2 hit in water
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Ascend to lower the PPO2
Add diluent to breathing loop Secure O2 cylinder if O2 addition is uncontrolled |
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Explain the off effect and how long after it may occur.
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CNS O2 Sx's several min. after diver comes off gas or reduces PPO2
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What are the Sx of pulmonary O2 tox
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Lung irritation w/ Sx of chest pain, cough, and pain on inspiration that develop slowly and become increasingly worse as long as elevated level of O2 is breathed
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What are the 2 primary causes of Hypoxia in a MK-16 Diver
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Failure of O2 Add valve
Failure of primary electronics |
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If Sx of unconsciousness or convulsion occur at the beginning of a closed circuit dive, what is the MOST LIKELY cause?
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Hypoxia not O2 tox
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List five Sx of hypercapnia
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-Increased rate and depth of breathing
-labored breathing -Headache -Confusion -Unconsciousness |
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One of your divers has had an absorbent failure which has caused him to get Sx of hypercapnia on the bottom. He starts to feel better on ascent, Why? What other concerns would you have for this diver if he owed decompression?
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-Why-Ascent will cause PPCO2 to decrease
-High CO2 levels will increase the likelihood of a CNS O2 Sx -CO2 retention could be caused from rig flood out. |
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Should you use a weak acid solution such as vinegar or lemon juice for a chemical injury?
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No, not recommended.
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Your diver sends a 2-3 and can stay in the water. What are you going to do?
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-Stdby to assist
-Descend to depth -Multiply all stops from original schedule by 1.5, stop every 10' -Lengthen stops as required to control Sx's -Surface and xport to chamber on O2 |
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Are your divers always going to be on a single dive (no repet) if they haven't dove in 12 hours
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No, MK-16 SI can go as high as 15:50
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Due to pulmonary O2 tox concerns, the No D limits for certain depths are limited to :240 min. What are these depths for N2O2 and HeO2?
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N2O2- 20'-60'
HeO2- 20'-50' |
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What 4 general categories shall be collected and analyzed for ALL diving operations?
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-Surf conditons
-Underwater Conditions -Equipment and Personnel resources -Assistance in Emergencies |
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How much does the Mk-16 weigh (fully charged)?
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64 lbs
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you have alternating red and green and all 3 sensors are between 1.15 and 1.45. What does this mean?
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Low primary batter Voltage
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What is the normal operating voltage for the primary battery as seen on secondary display
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1.30 - .00
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Define exceptional Operating Voltage for the primary battery and what are the readings?
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.00 to -.95 The remaining usable primary battery voltage, which may be used in situations where a short period of decompression time remains or in emergency sitiuations as determined by the diving supervisor.
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Primary batteries that have dropped below 5.2 volts or -.95 on secondary are discarded. Why?
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The batt are considered unreliable. You would loose primary display and O2 add
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What are the charge rates for bottles
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100 psi/min dry
200 psi/min wet |
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List six times in which "initial setup procdures" are completed.
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-Minimum of every 6 months
-Prior to a mission -After any repair -Upon receipt -Brining out of lay up |
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During continuous diving operations when do you have to complete Post Dive procedures
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Every 24 hours
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How many breathing cycles should be completed prior to leaving surface with HeO2
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Three
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While doing initial set ups you notice a date scribed on the O2 sensors. The date was a year ago. What is this date and what does it mean to you
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Date removed from plastic bag and put into service. The sensor has another year of service life.
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If the Mk 16 Mod 1 is not scheduled to be used within 24 hours after completing initial set ups how long can we keep it in a std by condition
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2 weeks
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After completing set ups you have _____ until a predive is mandatory
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24 hours
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During your post dive procedures and the UBA is not expected to be used within _______, place the UBA in lay up storage
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30 days
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Analysis of the oxygen content of HeO2 mixtures shall be accurate to w/in
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-/+0.5%
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All O2 sensors must read between___and___(mV)
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22 and 28 mV
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Allow O2 sensors to stabilize in air for__min. prior to testing
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5 min.
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UBA canisters may be set up____days prior to diving
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14 days
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Recalibrate when sensor(s) are____or____in the sensor housing
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replaced or repositioned
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Any primary batt. that has been discharged below___on the____scale on the batt. tester (5.2V using the lotmeter with test leads) or___on the secondary display is considered unreliable and shall be discarded.
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70%
7.5V scale |
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Clean all parts requiring O2 cleaning in accordance w/_____and store in double plastic bags.
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MIL-STD-1330
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When primary batt. will not charge to a min. of___or___, it is unreliable and shall be discarded.
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80%
6.0V |
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Before performing maintenance actions on MK 16, ____pneumatics system and_____bottles
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Bleed
Remove |
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A new_____is required each time a Bendix connector is disconnected.
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O-ring
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Do not go beyond____position when backing off on the thumbwheel switches
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F
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Lid retainer must be backed off____turn after tightening to prevent seizing
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One-eight (1/8th)
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Under normal conditions the anticipated duration of the ____bottle exceeds the_____bottle
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diluent exceeds O2
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Absorbent duration_____as temperature_____and as depth increases
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duration decreases as temp. decreases
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MK 16 Buoyancy
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-/+2lbs in seawater
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MK 16 Bottle capacity
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21ft^3 @ 3000psig
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Mk 16 blowout disk reating
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4500psig
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Mk 16 breathing loop capacity
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8.5 liters
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MK 16 battery discharge life.
Primary Secondary |
Primary
10hrs @ 5mA Secondary 100hrs @ 3mA |
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Oxygen and diluent bottles are made of_____and______.
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Inconel 718
316 stainless steel |
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Whenever the Secondary batt. becomes low the letters___light in the___corner of the display
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LO-BATT
upper left-hand corner |
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The O2 Add valve is a___type
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peizoelectric
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the O2 add valve admits O2 to the breathing loop at approx.
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5 SLM
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The regulator body is used to reduce gas pressure in the high pressure bottles down to a working pressure between____and____psig
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230 and 270psig
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NO GAS ADDITION WHEN DILUENT BYPASS IS DEPRESSED
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MONITOR SECONDARY STAY ON CLOSED CIRCUIT MODE
4-2-4 |
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COMPLETE RIG FLOOD OUT
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HEAD-UP ATTITUDE ADD DILUENT TO FORCE WATER OUT BREATHE OPEN-CIRCUIT
4-2-4 |
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STEADY RED OR SIMULTANEOUSLY ILLUMINATED STEADY RED AND GREEN
DROPPING SEC. READINGS |
MONITOR SEC. MANUALLY DRIVE RIG ADD O2 AS NEEDED
4-2-4 |
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NO GAS ADDITION WHEN O2 BYPASS VALVE IS DEPRESSED
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MONITOR SEC. ADD DILUENT TO MAINTAIN A BREATHABLE GAS MIX. BREATH OPEN-CIRCUIT
4-2-4 |
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NO PRIMARY DISPLAY (LED)
DROPPING SEC. DISPLAY READINGS |
MONITOR SECONDARY
MANUALLY DRIVE RIG ADD O2 AS NEEDED 4-2-4 |
