chamber operations Flashcards
What are the 4 notes for the Navy chamber support levels?
NOTE 1: Based on space constraints at the site, the Commanding Officer may authorize extension of the surface interval to a maximum of 7 minutes
NOTE 2: A non-Navy chamber may be used if authorized in writing by the first Flag Officer (FO) in the chain of command, and must include a NAVSEA 00C hazard analysis.
NOTE 3: A non-Navy chamber may be used if it is evaluated utilizing the NAVSEA non-Navy recompression chamber check sheet, and authorized in writing by the Commanding Officer.
NOTE 4: During extreme circumstances when a chamber cannot be reached within 6 hours the Commanding Officer can give authorization to use the nearest approved recompression facility.
What are the 3 Navy recompression chamber support levels?
LEVEL 1: A U.S. Navy certified recompression chamber close enough to the dive-site to support surface decompression with a surface interval of 5 minutes. (NOTE 1,2)
LEVEL 2: A U.S. Navy certified recompression chamber accessible within one hour of the casualty (NOTE 2)
LEVEL 3: A U.S. Navy certified recompression chamber accessible within six
hours of the casualty (NOTE 3,4)
An EEHS has a single lock and allows a patient to be administered oxygen at what depth while in transport to a recompression chamber?
60 fsw
Why is the EEHS not considered a recompression chamber?
Does not provide hands-on access to the patient
Collectively a recompression chamber system must be able to impose and maintain a pressure equivalent to what depth on the diver?
165 fsw (6 atmospheres absolute)
How many chamber occupants can you treat with a RCF series 6500 and 5000?
RCF Series 6500: 12 occupants
RCF Series 5000: 7 occupants
What diameter is the SNDL double lock recompression chamber?
54” Diameter
The SNDLRCS can comfortably accommodate how many divers?
4 divers in the inner lock and 3 divers in the outer lock
What are the 3 TRCS Mods?
Mod 0: TRC and TL
Mod 1: TRC only
Mod 2: TRC and TL with 5,000 psi upgrade
A TRCS Mod 0 or Mod 2 without a TL CO2 Scrubber is limited to how many occupants?
One patient and one tender
What TRCS Mods can be used when a Level I Recompression Chamber is required or Surface Decompression dives are planned?
Mod 0 or Mod 2 (with TL CO2 Scrubber installed)
When a Level I Recompression Chamber is not required, any of the three TRCS Mods can be used.
The Fly Away Recompression Chamber (FARCC) system consists of how many inch double lock modernized chamber?
60-inch
Recompression chamber system, at a minimum, must be capable of conducting what treatment table?
Treatment Table 6A
What sufficient amount of air should the primary and secondary air supply of recompression chamber have?
Primary: pressurize the inner lock once (1) to 165 and the outer lock twice (2) to 165 and ventilate the chamber
Secondary: inner and outer lock once to 165 and ventilate the chamber
Describe a Category “A” chamber.
No BIBS overboard dump
No CO2 scrubber
No air BIBS
No O2 and CO2 monitor
Describe a Category “B” chamber.
BIBS overboard dump
No CO2 scrubber
No air BIBS
O2 and CO2 monitors
Describe a Category “C” chamber.
BIBS overboard dump
CO2 scrubber
No air BIBS
O2 and CO2 monitors
Describe a Category “D” chamber.
BIBS overboard dump
CO2 scrubber
Air BIBS
O2 and CO2 monitor
Describe a Category “E” chamber.
BIBS overboard dump CO2 scrubber O2 and CO2 monitor Spare CO2 scrubber Secondary power supply NITROX BIBS No Air BIBS
Do chambers that do not have latches (dogs) on the doors required to have a relief valve on the outer-lock?
No
Where is emergency lighting required on a recompression chamber?
External control station
Outer lock
Inner lock
Do not allow oxygen supply tanks to be depleted below what psig?
100 psig
What position is the chamber gag valve lock-wired in?
Open position at all times (only closed in the event of relief valve failure)
Close only if relief valve fails
What size are all chamber placards?
4 to 6 inch placard viewable by operating personnel
What is the ventilation rate for chamber with and with-out bibs?
With: 2 acfm for each diver at rest and 4 acfm for each diver not at rest
With-out: 12.5 acfm for a diver at rest and 25 acfm for a diver not at rest
If ventilation of a chamber is interrupted it should not exceed what amount of time?
Time should not exceed 5 minutes in any 30 minute period
When resumed twice the volume of ventilation should be used for the interruption
What is the most efficient method of ventilation in terms of the amount of air required?
Continuous ventilation
Does the size of the chamber influence the rate (acfm) of air required for ventilation?
No
When are pressure tests required on recompression chambers?
When initially installed
2 year interval
After major over-haul or repair
When shall chambers receive routine maintenance with the post-dive check list?
After each use
Once a month
How often is a chamber inspected inside and out?
Annually
What types of chamber s are required to be painted?
Steel Chambers (stainless steel chambers are not required to be painted)
How much faster does a fire spread in a chamber than at atmospheric pressure because of the higher ppO2?
2 to 6 times faster
What precautions are taken to minimize fire hazards in the chamber?
Durett or Submarine mattress (enclosed in flame proof covers)
100 % cotton sheets and pillow cases
Clothing is 100% cotton or for chambers (Diver swim trunks made of 65% polyester 35% cotton material are acceptable)
Use lubricants approved in NSTM chapter 262
Divers candidates must be physically qualified in accordance with what?
Manual of the medical Department,
Art. 15-102
What are the requirements for a diver candidate pressure test?
Equalize both ears to a depth of 60 fsw
Passed the screening physical readiness test in accordance with MILPERSMAN 1220-100
What are the post observation periods for a pressure test candidate?
Immediate chamber site: 15 minutes
Test facility: 1 Hour
How many categories of chambers are there?
5
A thru E
What are recompression chambers pressurized to during a pressure test?
100 fsw (45 psig)
225 fsw (100 psig) for 5 minutes
Depressurize to 165 fsw: hold for 1 hour. Not allowed to drop below 145 psig (65 psig)
What size hole should be drilled in hearing protection used for recompression chamber operations?
1/16 inch hole
What is the floodable volume for the RCF 6500, RCF 500, ARS 50 Class, TRC and TL?
RCF 6500: 440 cuft (IL), 144 cuft (OL)
RCF 5000: 162 cuft (IL), 61 cuft (OL)
ARC 50 Class: 134 cuft (IL), 68 cuft (OL)
TRC: 45 cuft
TL: 45.5 cuft
