2.1.1 Passenger submersible craft should be designed,
constructed and maintained in compliance with the requirements of
a recognized organization as defined in paragraph
1.2.15 or with applicable standards recognized by the flag
State Administration, and, in both cases, the State(s) in whose waters
the passenger submersible craft will be operating, which provide an
equivalent level of safety.
2.1.2 The basic requirement for the passenger
submersible craft design is that, as far as practicable, in the event
of any single failure the craft can return to the surface without
external assistance. Appropriate backup systems and equipment should
be incorporated to meet this general design requirement. The craft
should be able to attain positive buoyancy at any time.
2.1.3 Passenger submersible craft should operate
only in waters with a sea-bed depth not greater than the craft's rated
depth. The Administration, however, may consider operation in areas
with a greater sea-bed depth on the basis of safety evaluations demonstrating
the adequacy of provisions and/or procedures.
2.1.4 Adequate measures should be taken to prevent
passengers from interfering with the operation of passenger submersible
craft.
2.1.5 The passenger submersible craft should be
designed for and be capable of operating in the environmental conditions
and temperature ranges envisaged both whilst on the surface and under
water.
2.1.6 The arrangement of occupied spaces should
provide for easy evacuation.