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46 Cards in this Set
- Front
- Back
Describe the MK16 MOD 0. |
The MK16 MOD 0 is a 0.7 ata constant ppO2 closedcircuit mixed-gas underwater breathing apparatus.
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What are the maximum working limits for the MK16 MOD 0
UBA? |
The maximum working limits are 150' when N2O2 (air) is used as a diluent or 200 fsw when 84/16 HeO2 mix is used as a diluent.
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How is CO2 absorbent duration directly affected by the temperature and depth?
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Absorbent duration decreases as temperature decreases and as depth increases.
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Why must the diver always be aware of CO2 toxicity symptoms?
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Because the MK 16 MOD 0 UBA provides no visual warning of excess CO2 problems.
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In addition to the danger of CO2 toxicity what 2 other potential hazards might a diver encounter?
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The potential hazards of 1)hypoxia and 2) central nervous system (CNS)oxygen toxicity.
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When can Hypoxia occur?
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Hypoxia can occur when there is insufficient oxygen in the recirculation circuit.
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If O2 is not added to the breathing circuit how long will the breathing mixture sustain life?
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A period of 2-5 minutes.
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What are the four basic systems of the MK 16 MOD 0?
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Housing, recirculation,
pneumatics, and electronics. |
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What are the two functions of the CO2 scrubber?
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To remove CO2 and to remove moisture.
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What is the high O2 alarm?
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Flashing green.
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What is the low O2 alarm?
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Flashing red.
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Waht is the normal operational ppO2 setpoint for the MK 16 MOD 0?
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The normal operational ppO2 setpoint for the MK 16
Mod 0 UBA is 0.75 ata. |
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How many displays does the MK 16 MOD 0 have and what are they for?
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The MK 16 MOD 0 UBA has 2 displays that provide ppO2, battery condition, and oxygen sensor malfunction info.
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What does a stesdy green light on the primary display indicate?
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A steady green indicates normal oxygen range, 0.60 to 0.90 ata ppO2.
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What does a stesdy red (or red & green at the same time) light on the primary display indicate?
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A primary electronics failure.
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What does a flashing red light on the primary display indicate?
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Flashing red indicates low oxygen content, less than 0.60 ata ppO2.
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What does an alternating red/ green light on the primary display indicate? (4 things)
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A normal transition period, one sensor out of limits, low primary battery power, or primary electronics failure.
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How is the secondary display powered?
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The secondary display is powered by four 1.5-volt batteries.
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What is the minimum personnel requirements for MK 16 MOD 0 diving operations?
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The same as open circuit SCUBA, a minimum of 4.
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What is the floodable volmue of the MK16 Mod 0 UBA oxygen flask?
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0.1 cubic feet.
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What is the O2 consumption rate for divers diving the MK16 MOD 0?
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Oxygen consumption by the diver is computed as 0.049 scfm (1.4 lpm).
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What is the formula used to figure Rankine?
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Rankine = Temp. (fahrenheit) plus 460
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How much diluent does the MK 16 MOD 0 hold? (at 3000 psi)
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The MK 16 MOD 0 diluent bottle holds approximately 21 standard cubic feet.
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When would you dive without a budy line?
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Only in situations where their use is not feasible or where their use will pose a greater hazard to the divers.
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What do you call a budy line over 10' long?
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Any buddy line over 10' in length is called a distance line, the length of a distance line shall not exceed 81' (25 meters).
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Can you use SCUBA as a stand by diver when diving MK 16 MOD 0? If so, how deep?
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Yes, open circuit scuba may be used to a maximum depth of 130 fsw.
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How are MK16 tending lines, marker lines, and lazy-shot lines marked.
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The lines are marked with red and yellow or black bands, starting at the divers end red band indicate 50' and yellow or black bands mark every 10'.
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True or False?
A single depth gauge and wrist watch may be used when diving with a partner. |
True, as long as divers are connected with a budy or distance line.
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What are recompression chamber considerations for diving closed circuit UBAs?
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Recompression chamber and DMO
are not required on station unless the dives will exceed the maximum working limit. |
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What is the max decent rate for the MK 16 MOD 0?
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The maximum descent rate is 60 feet per minute.
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What does 1 pull from diver to tender mean?
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Arrived at lazy shot (given on lazy shot).
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What does 7 pulls from diver to tender mean?
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I have started, found, or completed work.
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What does 2-3 pulls from diver to tender mean?
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I have decompression symptoms.
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What does 3-2 pulls from diver to tender mean?
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Breathing from EBS.
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What does 4-2 pulls from diver to tender mean?
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Rig Malfunction.
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What does 2-1 pulls from diver/tender to tender/diver mean?
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Unshackle from the lazy shot.
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How often should divers monitor their primary and secondary displays?
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Every 2-3 minutes.
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Why are standard U.S. Navy decompression tables not used when diving closed circuit UBAs?
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Because the ppO2 remains constant at a preset level regardless of depth.
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Is surface decompression used with MK 16 MOD 0 diving?
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No appropriate surface decompression tables have not been developed for constant ppO2 closed-circuit diving.
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How do you determine MK16 divers decompression obligation? (3 ways)
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1)The Navy Dive Computer (NDC)
2)Constant ppO2 Decompression Tables 3)Combat Swimmer Multilevel Dive Tables |
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What ppO2 should be maintained while decompressing after a MK 16 MOD 1 dive?
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During decompression ensure a 0.7 ppO2 is maintained.
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What are 3 ways to lower the oxygen partial pressure when diving the MK 16 MOD 1?
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1) Ascend
2) Add diluent to the breathing loop 3) Secure the oxygen cylinder |
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What is thedeepest and longest mission porfile for the MK-16 MOD 1 using N2O2?
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150 FSW for a max bottom time of :35.
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What is the longest and deepest mission porfile for the MK-16 MOD 1 using HEO2?
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300 FSW :25.
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When is the EBS (emergency breathing system) required?
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When doing planned decompression dives,
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During continuous operations how often are the predives preformed?
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A minimum of every 24 hours.
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