KM-37 UBA Flashcards
the KM-37 face port is made of __________
1/4” Lexan
what does the dial-a-breath do?
- controls breathing resistance
- increases or decreases spring tension
- offers diver control over regulator sensitivity and ability to compensate for varying OBPs settings
what is the purpose of the gas supply nonreturn valve?
prevents a reverse flow of gas from the helmet to the umbilical
what feature prevents both barotrauma and loss of emergency breathing gas if depressurization of the umbilical occurs?
gas supply nonreturn valve
what is the LP port used for?
dry suit inflation
what does the bent tube assembly port do?
channels breathing gas from the gas supply nonreturn port and the EGS valve port to the demand regulator
what does the steady flow valve port do?
channels breathing gas to the gas train inside the helmet
what are the 4 purposes of the steady flow valve assembly and gas train?
- defogging
- secondary breathing source if demand regulator fails
- de-water the helmet
- ventilation
how is the exhaust / water dump valve assembly activated?
by increasing pressure in the hat by using the steady flow valve
the EGS is mandatory for dives deeper than ______ fsw or when ________________
- 60 fsw
- diving in enclosed / confined spaces
the KM-37 first stage regulator is set at manufacturer’s recommended pressure but no lower than ______
135 psig OBP
the pressure relief valve on the first stage is set at ____ +/- ___
180 +/- 5 psig
the umbilical assembly is not to exceed _____ ft in length
600
a KM-37 dive mission will be considered complete if a break of ___ days or more in service is anticipated
7
an EXTENDED KM-37 dive mission is one that exceeds ___ days without any one break in service of ___ days or more
- 30
- 7
