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37 Cards in this Set

  • Front
  • Back
Dives to 190 fsw can be made when ____ is used as a diluent and ____ fsw when using HeO2 (__/__) as a diluent?
190 fsw with N2O2
300 fsw with HeO2 (88/12)
What is considered exceptional exposure when diving N2O2?
Due to increased breathing resistance and concerns about carbon dioxide retention and CNS O2 toxicity, planned N2O2 dives deeper than 150 fsw are considered exceptional exposure dives and require prior CNO approval
When using N2O2 as a diluent, what is the MK 16 Mod 1 Operational Characteristics?
Normal working limit: 150 fsw, Maximum: 190 fsw
Permissible 1.3 ata N2O2 dive profiles
-multiple repet dives from 0-150 fsw provided all the dives are No "D" dives
-1 deco dive from 0-150 fsw plus up to 3 additional No "D" dives from 0-150 fsw. The 3 No "D" dives may precede, follow, or bracket the decompression dive.
-2 deco dives (initial deco dive plus one repet deco dive) from 0-150 fsw. Additionally No "D" dives are not allowed before of after the deco dives.
-repet dives from 151-190 fsw under the rules above providing CNO grants a waiver for exceptional exposure diving.
Switching diluents between dives is NOT authorized. A repetitive dive on air can be done following a dive on N2O2
What are the operational characteristics of the rig when diving HeO2 as a diluent?
Normal: 300 fsw, Max: 300 fsw
Premissible 1.3 ata HeO2 dive profile
- multiple repet dive from 0-200 fsw provided all the dives are No "D" dives.
- 1 deco dive from 0-200 fsw plus up to 3 additional No "D" dives from 0-200 fsw. The 3 No "D" dives may precede, follow, or bracket the decompression dive.
- 2 deco dives (initial deco dive plus one repet deco dive) from 0-200 fsw. Additionally No "D" dives are not allowed before of after the deco dives.
- 1 No "D" dive or 1 decompression dive from 201-300 fsw. Repet diving is not allowed deeper than 200 fsw.
Are switching diluents between dives authorized?
No, there are no procedure for performing a repetive dive on N2O2 following a dive on HeO2 or vice versa.
Can repetive dives on air be performed following a MK 16 MOD 1 dive on nitrogen?
Yes
When shall a full face mask be used?
When deploying a single untended diver, single marked diver, paired marked diver, and when using an approved BC.
What are the recompression chamber considerations?
An R/C is required within 1 hr. for all closed circuit 1.3 PO2 UBA deco dives deeper than 200 fsw, regardless of the mission.
What should be determined prior to beginning and diving operation?
Location of the nearest functional R/C. Positive confirmation of the chambers availability should be obtained.
Optimal method of transportation to the treatment chamber. An evacuation plan should be included in the diving supervisors brief.
What are required prior to any planned dive which exceeds the maximum working limits?
A recompression chamber, CNO waiver, and a diving medical officer
What should tending lines be manufactured from and how shall the lines be marked?
-Lines should be manufactured from any light line that is bouyant. (1/4 inch polypropylene is quite suitable)
-Lines should be marked starting at the clump
-50 ft. red bands
-10 ft. yellow or bvlack bands
What are the 6 general MK 16 MOD 1 diving equipment requirements?
1. motorized safety boat
2. Radio (comms w/ parent unit, chamber, comms. between safety boats.)
3. High intensity wide beam light( night ops)
4. Dive flags and & or special ops. light as required.
5. sufficient (2 qtrs.) fresh water in case of chemical injury
6. E.B.S. for planned decommpression dives.
When can open circuit scuba be used for stby diver during MK 16 diving?
-When appropriate & non-influence diving operations.
SCUBA work limits
1. Normal 130 fsw
2. Max 190 fsw with CO or OIC permission
3. 100 fsw using SCUBA cylinders with less than 100 scf
4. STBY diver with atleast 100 scf cylinder capacity for dives deeper than 60 fsw.
5. Within no-D limits
6. Current 1 knot max. Current greater than 1 knot, requires ORM analysis as a minimum. The divers must be tended or witness float.
What are the minimum manning requirements for a MK 16 dive team?
-4 for 1 diver
-5 for 2 divers
1-Dive supervisors (May act as time keeper/recorder, stby tender.
1 or 2-Divers
1-Stby diver (at dive sups discretion, the stby diver shall be fully dressed w/ the exception of scuba or MK 16 MOD 1, mask & fins. These items shall be ready to don.)
1-Diver tender (1 tender per diver when divers are surface tended. If using a buddy line, 1 tender is required for each buddy pair.
*EBS operator is required for MK 16 MOD 1 decompression dives.
What must a MK 16 MOD 1 diver do prior to a deco. dive if he has not conducted one within the previous 6 months?
He must complete open water deco. training dives.
What must a MK 16 MOD 1 diver do if he has not made a MK 16 dive within the previous 6 months?
1. Refamiliarize himself with the MK 16 MOD 1 EPs & OPs
2. Complete MK 16 MOD 1 training dive prior to making a operational dive.
How may MK 16 MOD 1 diver qualifications be obtained?
1. By completion of the MK 16 MOD 1 basic course (A-431-0075).
2. Qualifications remain in effect as long as dive qualifications are maintained in accordance with military personnel manual article 1220-100.
What is considered exceptional exposure dives and why?
Due to an increased breathing resistance, and concerns about CO2 retention & CNS O2 toxicity, planned N2O2 dives deeper than 150 fsw are considered exceptional exposure dives and require prior CNO approval.
What are buddy lines and distance lines?
Buddy lines - Up to 10 ft. (3 meters) in lenght
Distance line - Any buddy line over 10 ft. in lenght but shall not exceed 81 ft. (25 meters). Distance lines shall be securely attached to both divers.
When is a safety boat required and when is it recomended?
Required - A minimum of 1 motorized safety boat must be present for all open-water dives.
Recommened - Tended pier dives or diving from shore.
How is the diluent gas used in the MK 16 MOD 1 rig?
Diluent gas is used to maintain the required gas volume in the breathing loop and is not depleted by metabolic consumption.
What standard safety procedures shall be observed during EOD diving operations?
1. An EOD diving officer is required to be in tactical control of all EOD diving operations tha involve render safe procedures (RSP). Tactical control is defined as either on-station or in continuous, full time tactical voice communications with the dive team conducting the RSP.
2. When diving on unknown or influence ordnance, the stby diver's equipment whall be the same type as the diver performing the actual procedure.
When may an EOD diving officer authorize the employment of a single, untended diver?
When it is deemed that the ordnance hazard is greater than the hazard is greater than the hazard presented by diving alone. All single, untended divers shall use a full fask mask(FFM).
Considerations
-Experence of the diver
-Confidence of the team
-Type and condition of ordnance suspected
-Environmental conditions
-Degree of operational urgency required
What are the MK 16 MOD 1 "diver to tender" line pull signals?
1 pull: Arrived at lazy shot (given on lazy shot).
7 pull: I have started, found, or completed work.
2-3 pulls: I have decompression symptoms.
3-2 pulls: Breathing from EBS (EBS UBA is functioning properly).
4-2 pulls: Rig malfunction
2-1 pulls: Unshackle from the lazy shot
5 pulls: I have exceeded the planned depth of the dive. (This is followed by 1 pull for every 5 fsw of depth the planned depth was exceeded).
What is the maximum descent rate?
60 feet per minute.
What may happen to the primary display on descent depending on the rate of descent?
The primary display may illuminate flashing green. It may take 2 - 5 mins to consume the additional O2 added by the dilluent during descent.
When is there an increased risk of CNS O2 toxicity when diving the MK 16 MOD 1?
During the descent phase of the dive. Dive sups and divers shouldbe aware that the O2 PP of 1.6 ata of higher may be temporarily experienced during descent on N2O2 dives deeper than 120 fsw (21% O2 diluent) and on HeO2 dives deeper than 200 fsw (12% O2 diluent).
At what depth should the primary display indicate a transition from 0.75 ata to 1.3 ata?
At 33 fsw
While on descent, at what depth shall the dive be terminated if there is no transition?
The diver should verify this transition with the secondary display. If there is no transition with continued descent past 40 fsw, the dive should be terminated
What general guidelines should divers adhere to as the dive is conducted?
-Monitor primary and secondary display
-Don't add O2 on descent, except as part of an emergency procedure or at anytime while on the bottom due to the increased risk of CNS O2 toxicity
-Wear adequate thermal protection
-Know and use the proper amount of weights for the thermal protection worn and the equipment carried
-Check each others equipment for leaks
-Do not exceed the UBA canister duration and depth limitaions for the dive
-Minimize gas loss from the UBA (avoid mask leaks and frequent depth changes)
-maintain frequent visual or touch checks with buddy
-Be alert for SX suggestive of a medical disorder
-Use tides and currents to maximum advantage
How often should you check the primary and secondary display and your high pressure indicators while you are at depth?
Primary display-frequently to ensure the O2 level remains at the set point.
Secondary Display-Every 2-3 minutes to ensure that all sensors are consistent with the primary display and the battery voltages are properly indicating
HP indicators-frequently to ensure the gas supply is adequate to complete the dive.
What is the maximum ascent rate for the MK 16 MOD 1?
30 FPM
What may the primary display show while on ascent when water pressure decreases faster than the O2 can be added via the O2 addition valve?
The primary display may show an alternate red/green then flashing red for low ppO2.
True or false, is surface decompression authorized for MK 16 MOD 1 operations?
False
What is the RNT and RHT exception rules and how does it apply to repetitive MK 16 MOD 1 diving?
Determine the table and schedule for the repetitive dive by adding the bottom times and taking the deepest depth of all the dives in the series, including the planned repetitive dive. If the resultant table and schedule require less deco than the table and schedule obtained using the repetitive dive worksheet, it may ne used instead of the worksheet table and schedule
During descent, at what depth does the MK 16 MOD 1 switch from a 0.75 ata mode to the 1.3 ata mode?
At 33 fsw +/- 2 fsw.
When some dives are shallower than 35 fsw and others are deeper, how do you convert 0.75 ata dives to 1.3 ata dives to use the RNT/RHT exception rule?
The equivalent depth on 1.3 can be obtained by adding 20 fsw to the depth of the dive on 0.75 ata.