KM 37 UBA Flashcards
What are the 4 major assemblies?
1) Helmet
2) Umbilical
3) EGS
4) Harness
What is the helmet made of?
Yellow Fiberglass
How much does the helmet weigh?
30.6 lbs
What is the face port made of?
1/4” Lexin
What type of regulator assembly does the KM-37 have?
Diving System International Navy (Super-Flow 350) demand regulator
What is the Dial-A-Breath capable of controlling?
Up to 225 psig of over-bottom pressure
What is the purpose of the whiskers?
To carry exhaled gas away from the divers field of vision
What is the purpose of the Gas Supply Non-Return Valve?
To prevent a reverse of gas from the helmet to the umbilical
What is the purpose of the Low Pressure Port?
Dry suit inflation
What are the purposes of the Steady Flow and Gas Train?
1) Defog Faceplate
2) Secondary breathing source if demand regulator fails
3) De-water the helmet
4) Ventilate/Circulate
When is EGS mandatory?
Dives deeper than 60’ or when diving in enclosed/confined space
What are the EGS requirements when diving with EGS?
An adequatley charged SCUBA cylinder that provides sufficient air to bring the diver to his first deco stop or the surface on a no-deco dive
*K-valve or J-valve with reserve turned down
What is the first stage regulator set to?
Manufacturers recommended pressure but no lower than 135 psig over bottom
What is the relief set to?
180 +/- 5 psig
What must you ensure when connecting the first stage QD?
Turned 180 degrees
How long is an umbilical?
600 feet or less
What is the I.D. of the gas supply hose in the umbilical?
Minimum of 3/8”
What is the I.D. of a pneumofathometer?
1/4”
What are the depth limitations for air diving?
Normal - 190”
Max - 285”
What are the depth limitations for HeO2 diving?
Normal - 300”
Max - 380”
What average sustained flow must the air supply system be able to provide to the diver?
1.4 acfm
What does air consumption vary between?
0.75 - 1.5 in the demand mode (regulator)
How much acfm is consumed in free flow mode?
Greater than 8 acfm
What are the overbottom requirements for the KM-37?
0-60 fsw: 90 min, 135 desirable, 165 max
61-130 fsw: 135 min, 135 desirable, 165 max
131-190 fsw: 165 min, 165 desirable, 165 max
When planning a dive, what acfm is used to calculate descent and bottom phase?
1.4 acfm
When planning a dive, what acfm is used to calculate ascent and decompression phase?
.75 acfm
How much is the umbilical d-ring weight tested to?
500 lbs dead weight
What size are the gas supply and pneumo hose fittings?
9/16”
What are the to types of umbilical hose assemblies?
1) Rubber
2) Synthetic
What is the max life of a rubber breathing gas hose?
12 yrs
What is the max life on a synthetic breathing hose?
As long as deemed SAT (no time limit)
How much is the breathing and pneumo hose hydro tested to?
200% (twice) the max system operating pressure
*Operating Pressure for breathing air is 250 psi
What is the temperature range for storage of the helmet?
0-120 degrees F
