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85 Cards in this Set
- Front
- Back
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What are the characteristics of the MK3 MOD 0 LWDS?
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volume tank = 300psi
each flask = 191scf @3000psi Sufficent air for 2 dvrs 1 stby |
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Explain MK3 MOD 0 Configuration 1
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Pri air = 18scfm diesel compressor
Sec air = 1 rack = 3 flasks with 594scf @3000psi Depth = 60FSW |
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Explain MK3 MOD 0 Configuration 2
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Pri air = 3 racks = 9 flasks
with 1782scf @3000psi Sec air = 1 rack = 3 flasks with 594scf @3000psi Depth = 130 FSW |
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Explain MK3 MOD 0 Configuration 3
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Pri air = 3 racks = 9 flasks with 1782scf @3000psi
Sec air = 2 racks = 6 flasks with 1188scf @3000psi Depth = 190FSW |
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Explain MK3 MOD 1
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Identical to MK3 MOD 0 except control console and volume tank is modified to support 5000psi for use with the ASRA (Air Supply Rack Assembly)
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Emergency procedures for MK-20 without EGS
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notify topside, depress purge button on demand regulator to verify loss of primary air, release weight belt if necessary, if umbilical line is fouled release spinnaker shackle, remove face mask, return to surface.
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What are the pre-mission procedures for MK-20
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to maintenance, inventory, inspect and test MK-20. Conducted to specific mission. good for 30 days.
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When does the relief valve lift in the MK-20 and when does it reset
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Lifts @ 210 +/- 36psig, and will reset at 10 psig below set pressure
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When are the pre-dive/post-dive procedures for MK-20 accomplished
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Pre-dive = conducted before first dive of day
Post-dive = conducted at end of day, or specific mission or exceeds 30 days, long term storage FFM must be disenfected and dried |
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What are the depth limits on MK-20
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SSD= 60 FSW
SCUBA= 190 with CO permission, approved single hose first stage regulator with octopus, and approved regulator to depth as indicated on ANU list. |
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What does the "mini test kit" for the MK-20 check
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valve seating, leakage, automatic positive pressure, exhalation resistance without positive pressure, water tightness, and airflow capacity
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What are the primary and secondary means of communication for the MK-20
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Primary= voive communication
Secondary= line pull signals |
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What are the two types of communication assemblies for MK-20
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1) pre-amplified (communication adapter)
2) non pre-amplified |
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What are the characteristics of the MK-20 hose assembly
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30 inches in length, 5/16" inside diameter with male O2 fitting on end with swivil fitting on other end. Working pressure = 250psi
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When clearing Mk-20/mask clearing, what is the air comsumption rate
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0.75acfm-1.5acfm
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Mk-20 air supply system must be able to provide an average flow of ____ acfm
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1.4 acfm to the diver
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What is the over bottom pressure for MK-20
A) Mimimum B) Desired C) Maximum |
over bottom is 90-135psig
A)Min=90psig B)Des=135psig C)Max=135psig |
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What are the 2 types of regulators for MK-20
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1) positive pressure = .03psi
2) non positive pressure |
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What are the 4 major assemblies of the MK-20
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1) Facemask
2) Umbilical to mask hose assembly 3) Communication assembly 4) Harness assembly |
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When is mission maintenance requited for MK-20
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1) Diving Supervisor anticipates immediate break in service of 7days or more
2) 30 day milestone is reached during extended dive mission 3) Condition of equipment is suspect |
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MK-20 emergency procedures with EGS manifold block assembly are...
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notify topside, depress purge button to verify loss of primary, open EGS valve on manifole block, release weight belt if necessary, if lines fouled notify topside wait for instructions, if lines not fouled return to surface
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When are missions done on MK-20
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every 30 days or when mission is complete
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What is the max depth for MK-20
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SSD=60fsw
SCUBA= A) 130fsw normal working depth B)190fsw with CO approval |
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What is the working pressure of the mask to hose assembly for MK-20
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250psig
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What is the relief valve for MK-20 set at
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210psig +/-36psig
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What are the depth limitations for the MK-21 (superlite 17B)
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Air=190fsw
HeO2=300fsw |
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What are the flow requirements for the MK-21
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air suppply must be able to deliver sustained aif flow of 1.4acfm
demand mode consumption between 0.75-1.5 acfm free flow mode greater then 8.0 acfm is consumed |
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What are the over bottom pressure requirements for the MK-21
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FSW Min Desired Max
0-60 90 135 165 61-130 135 135 165 131-190 165 165 165 *dual whiskers in use, 135 min |
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MK-21 dial a breathis capable of controling up to how many psig over bottom pressure
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225psig over bottom pressure
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What does the gas supply non-return valve do in the MK-21
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Prevents the reverse flow of gas from the helmet to the umbilical
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Mission maintenance is not required prior to a mission if____
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1) Helmet has been idle less than 24 months with a certification tag
2) Maintenance requirement card 24M-1R (MIP5921/162) has been preformed since last use of equipment |
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Emergency procedure for demand regulator free flow are
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1)adjust dial-a-breath
2) report condition to topside 3) abort dive |
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Emergency procedures for umbilical gas supply failure are
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1)open EGS valve
2)report condition topside 3) abort dive *********WARNING******** use of steady flow with EGS will accelerate expenadature of EGS supply. DO NOT USE STEADY FLOW unless absolutely necessary |
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What are the emergency procedures for excessive breathing resistance
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1) adjust dial-a-breath
2)report condtion topside 3) open steady flow valve (if needed) 4) press purge button (if needed) 5)open EGS valve (if needed) 6) abort dive |
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Emergency procedures for Helmet flooding are
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1) assume upright position with head tilted to left
2) open steady flow valbve or press purge button 3) report condition topside 4) check for leaks 5) open steady flow valve (if needed) 6) abort dive |
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What are the communications for MK-21
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Primary= voice communications
Secondary= Line pulls |
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What is the first stage regularot set at on EGS when diving with MK-21
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Minimum 135psi
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What would the manifold pressure be if diving MK-21 to 59 ft
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DX..445+mmp
(0-60fsw=90mmp) 59X.445+26.84 (27psig) 27psig+90=117 |
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If diving Mk-21 and you experiance breathing resistance, what should you do
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adjust the dial-a-breath
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What is the max depth for MK-21
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Air=190fsw
HeO2=300fsw |
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What are the trace elements used in diving
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(2)H's (2)N's MAX K
Hydorgen Helium Nitrous Oxide Neon Methane Argon Xenon Kry |
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What is the working pressure on the FADS III
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265psi
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What is the FADS III
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a portable, self contained, surface supplied diver life support system designed to support dive missions to 190fsw
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What are the 4 major assemblies of the FADS III system
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1) Control Console Assembly
(CCA) 2) Volume Tanks Assembly (VTA) 3) Air Supply Rack Assembly (ASRA) 4) 5000psi compressor system (usually diesel can be electric) |
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What are the only 2 ways SCUBA cylinders will be charged
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1) by cascading or transfering air from large cylinders into SCUBA tanks
2) by using a high pressure air compressor |
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What are the depth limits for SCUBA
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1) normal working limits 130fsw
2) maximum with CO approval 190fsw |
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1.5 knot currents require _____ when diving in open water
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additional weight
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When should you wear dry suit
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1) in thermal pollution
2) in vacinity of sewer outlet or industrial outfall discharging high temperature wastes 3)chemical/radiological contaminatio, oil leak, fuel leaks, or chemical ordanance or countermeasures 4) SCUBA divers are especially suseptable to biological contamination |
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What are the EP's for enclosed space diving
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1)notify topside
2)depress purge button on demand regulator to verify loss of primary air 3)remove face mask 4)insert SCUBA regulator mouth piece into mouth 5)exit enclosed space 6)release weight belt if necessary 7)if line is fouled, release spinnaker shackle from D-ring 8Return to surface following umbilical if possible 9)if line is not fouled keep umbilical in place with face mask trailing and return to surface |
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What are the charging rates for SCUBA
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Dry=200psig
Wet=400psig |
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What is an EGS
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An adaquately charged ANU approved SCUBA cylinder with a K or J valve turned down
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All U.S. Navy umbilicals shall consist of ____ as a minimum.
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a 3/8" inside diameter breathing gas hose (not to exceed 600ft), a 1/4" inside diameter pneumofathometer hose, a communication cable, a strength member, and a "D" ring with snap shackle or screw pin shackle installed. (combination/strength members are authorized)
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What type of connection or connector is used to connect the microphone and earphones
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a "crouse-hinds" connection
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When is EGS manditory
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All dives deeper then 60fsw require EGS, as well as all enclosed/connfined space diving
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When using a SCUBA cylinder for EGS what type of valve must you have
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A "K" or "J" valve, "J" valves must be turned down
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What is the first stage regulator set at
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at manufactures recommended pressure, but no lower then 135psig over bottom
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What is the pressure relief valve on the first stage regulator set at
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180+/- 5 psig
this is used to prevent rupture of low pressure hose should the first stage regulator fail |
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What is an EGS and what does it consist of
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EGS is Emergency Gas Supply, set at a minimum of 135psig with an extended whip 50-150ft in length. If EGS stays on surface set first stage regulator to 150psig
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What must the first stage regulator have with it
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must have an ANU approved submersable pressure gauge
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When pressure/load testing the pneumo hose it will be conducted at ____% fo the max system opeerating pressure, and the max system operating pressure is___
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200%
250psi |
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What is the maximum life of the rubber gas hose
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12 years max
all hoses under 12 years must be satisfactory IAW 5921/039 24M-1R and 60M-1R |
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What is the max life of synthetic umbilical assemblies
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synthetic umbilicals have no max life. they can remain in service as long as satisfactory IAW MRC5921/039 24M-1R and 60M-1R
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Where are "D" rings on an umbilical and what are they load tested to
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1) required on surface end and diver end of umbilical
2) load tested to 500lbs dead weight |
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What are the hose sizes on all spiral wound umbilical assemblies
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1) breathing hose 3/8" ID requires 9/16" fitting on end
2) pneumofathometer hose is 1/4"ID requires 9/16" fitting on end, diver end is open to ambient pressure |
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What are the EP's for fouled or pinned umbilical
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1)report condition and try to free umbilical
2)await instructions and assistance from dive partner or standby diver 3)attempt to free umbilical with dive partner or standby 4)request furthur instructions from dive sup if umbilical can not be freed |
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What is included in an umbilical assembly
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1)an umbilical not to exceed 600ft
2)a gas supply hose with minimum of 3/8" ID 3)a pneumofathometer hose 1/4"ID 4)strength/communication cable |
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How long must an EGS hose be when diving in an enclosed space or wreck diving
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Whips should be 50-150ft in length, if EGS is topside adjust first stage regularor to 150psig. Air dives below 190ft require CNO approval
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What are the 2 types of umbilical assemblies
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1)spiral wound
2)parallel |
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What are the characteristics of spiral wound umbilicals
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1) do not have seperate strenghth member
2) derives its strength from spiral construction |
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If you have current greater the ___knots you can not dive scuba
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1knot
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What is the commercial air diving cleanliness standard
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Fedspec BB-A-1034 Grade A source 1 (pressurized container) or source 2 (comperssors)
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How long is a buddy line
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6-10 feet
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What are the types of tables
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1) No "D"
2) "Air D" 3) RNT 4) sea level equivalent 5) altitude 6) surface interval before ascent to altitude |
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When is the only time you are not required to have a tending line when diving under a hull
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when surching for limpet mines
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When is a buddy line required in SCUBA
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if visability is limited, this maintains contact and communication
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What is MAX operating pressure
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the maximum a system operates under normal conditions
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What are the advantages of SCUBA
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minimum bottom disturbance
portability excellent mobilitity rapid deployment minimal manning |
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Minimum SCUBA side
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diver, standby, sup
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At what temperature is it considered ice or cold water diving
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37F
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How often are relief valves calibrated
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every 36 months
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When a system is certified, how long will a cert last
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3 years
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What is the max level for CO2 in divers air
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1000 PPM
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What is the maximum level for CO in divers air
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20 PPM
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What are the components of the stern tube
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tube
bearing seals inflatable boot dead lights |
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When diving inside a wreck what must you have
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chafing gear, gloves, steel toed salvage boots, flashlight
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