KM 37

Question 1

For KM37, EGS is REQUIRED for dives deeper than?

Answer 1

60 fsw

Question 2

EGS SCUBA cylinder must have enough gas to bring diver to…what?

Answer 2

first decamp stop OR

surface on a No-D dive

Question 3

What is the minimum pressure for EGS first stage regulator?

Answer 3

135 PSIG over bottom

Question 4

What is the pressure relief valve set for on the EGS first stage?

Answer 4

180 +/- 5 PSIG

prevents hose rupture if first stage regulator fails

Question 5

umbilical assembly cannot exceed ____ feet?

Answer 5

600 feet

Question 6

What are the components of an umbilical assembly?

Answer 6

Gas Supply Hose 3/8” ID
Pneumofathometer Hose 1/4” ID
Strength/COMS cable

Question 7

What is the only difference between the KM37 and MK20 maintenance schedules?

Answer 7

Must perform mission maintenence on KM37 every 24 months (vs 18 months for MK20)

Question 8

What is normal working limit depth for KM37 on AIR?

What is MAX working limit?

Answer 8

190 fsw
285 fsw (exceptional exposure)

Question 9

What is normal working limit depth for KM37 on HeO2?

What is MAX working limit?

Answer 9

300 fsw

380 fsw

Question 10

Air supply system must be able to provide an average sustained flow of ___ to the diver?

Answer 10

1.4 acfm

Question 11

What are the over bottom pressure requirements for the KM37?

Answer 11

0-60 fsw 90 min, 135 desired, 165 MAX
61-130 fsw 135 min, 135 desired, 165 MAX
131-190 fsw 165

Question 12

What is the MMP equation?

Answer 12

bottom pressure + over bottom pressure = MMP

(fsw x 0.445) + *135 = MMP

Question 13

How do you calculate required cylinder pressure for EGS?

Answer 13

1. Calculate Vr (variable rate) assuming 1.4 acfm for descent and bottom phase, and 0.75acfm for ascent and decamp phase: Vr = (D+33)/33 x 1.4 x T for ascent or Vr = (D+33)/33 x 0.75 x T
2. Convert variable rate into PSIG based on type of cylinder Floodable volume (FV): PSIG required = Vr/FV x 14.7 + Pm

*Pm is minimum cylinder pressure (135)