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 a. HAZCAT I items include the pressure boundary surrounding
the occupants/divers up to the first pressure piping stop valves.
HAZCAT I items, dependent upon the design, may also include other
system piping and components.
For example, if no completely
independent stand-by system exists then all piping and components
would be HAZCAT I.
Pressure vessel (of occupants/divers).
o
Pressure vessel viewports.
o
Pressure vessel penetrator fittings.
o
A n y other item or component which meets the
o
definition for HAZCAT I in paragraph 2.6.3.
HAZCAT II items include the systems, equipments and
b.
components which provide life support to the occupants/divers and
for which a completely independent standby system exists.
Primary Air Systems
o
Stand-by Air Systems
o
Vent Systems
o
BIBS Systems
AIR, OVERBOARD DUMP)
o
Electrical Lighting
o
o
A n y other item or component which meets the
o
definition of HAZCAT II in paragraph 2.6.3.
HAZCAT III items include the systems, equipments and
C.
components providing support to the occupants/divers, which are
not life critical, but for which action is required to continue
the dive.
Monitoring Systems
o
Flood and Drain Systems for Wet Complexes
o
Any other component which meets the definition of
o
HAZCAT III in paragraph 2.6.3.
HAZCAT IV items include all systems, equipments and
d.
components which are not HAZCAT I, II and III, and for which
repairs can be made at a convenient time.
Medical
Lock Pressurization
and vent
System
o
(excluding lock pressure boundaries)
Chamber Sanitary Flushing System
o
2.7
REPORTING
REQUIREMENTS
2.7.1
SCA Reports. The following are excerpts from SS521-
AA-MAN-010 addressing required reports to the System Certification
Authority (SCA):
a. Operating Limits. The diving system shall operate within
the certified operational limits specified as part of the
Operation outside of
requirements for sustaining certification.
the authorized operational limits without a valid waiver will
result in termination or suspension of system certification. Any
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