【船级社】 480_divingsystems_e_2022 Rules for Diving Systems.rar

1 The Rules for Diving Systems (hereinafter referred to as “the Rules”) apply to the survey and construction of the

deemed by the Society to be equivalent to those specified in the Rules.

The Society may modify parts of the requirements in the Rules taking the national requirements of the ship’s

flag state, kinds and the intended service area of the ship into consideration.

For diving systems with novel design features the Society may impose appropriate requirements of the Rules to

the extent practically applicable with additional requirements made on design and test procedures other than those

specified in the Rules.

The definitions of terms which appear in the Rules are specified as following (1) to (10) unless otherwise

gas supply system, for transfer of divers between the underwater work site and the attendant ship.

(4) “Pressure hull” is a shell structure, including closing means and penetrating pieces, capable of withstanding an

external pressure corresponding to the diving depth to admit persons and equipment in the pressure hull.

(5) “Deck decompression chamber” is a pressure vessel installed on board the attendant ship for adjusting the

pressure for diving operation and carrying out emergency repressurizing in case where troubles due to high

pressure may occur, which is composed of the shell structure, closing means, view ports and their accessories.

(6) “Maximum diving depth” is a maximum depth to which the diving bell can submerge safely, being a vertical

distance from the lowest surface of shell plating of the pressure hull to the water surface.

(7) “Anniversary Date” is the day corresponding to the expiry date of the Classification Certificate, excluding

expiry date of the Classification Certificate.

multiple instruments.

2 The applicant for the survey is to arrange a supervisor who is well conversant with the survey items intended for

the preparation of the survey to provide the necessary assistance to the Surveyor according to his requests during the

survey.

3 The survey may be suspended where necessary preparations have not been made, any appropriate attendant

1 Laid-up ships are not subject to Registration Maintenance Surveys. However, Occasional Surveys may be

carried out at the request of owners.

2 When laid-up ships are about to be re-entering service, the following surveys and surveys for specific matters

which have been postponed due to being laid-up, if any, are to be carried out.

(1) If the due dates for Registration Maintenance Surveys have not transpired while the ship was laid-up, then an

equivalent to the Annual Surveys specified in 2.3.2 is to be carried out.

(2) If the due dates for Registration Maintenance Surveys have transpired while the ship was laid-up, then these

Registration Maintenance Surveys are, in principle, to be carried out. However in cases where Special Surveys

and Annual Surveys are due, only the Special Surveys may be carried out.