Section 2 Ancillary Systems and Equipment

201. General

Ancillary systems such as hydraulic, pneumatic, fuel, ballast, telemetry, controls, etc. which may be provided on a single point mooring are to comply with the applicable requirements of the Rules for Mobile Offshore Unit except as specified in this Section.

202. Bilge pumping

Single point moorings are to be provided with a means for pumping from draining all tanks and void compartments. Pumping by means of a portable hand operated pump may be acceptable in lieu of a fixed bilge system.

203. Tank sounding

A manual means of sounding is to be provided for all tanks and void compartments.

204. Air pipes

1. All tanks that are filled or emptied through fixed pumping arrangements and all voids through which pressure piping passes are to be fitted with air pipes.

2. The structural arrangement of tanks or voids requiring an air pipes is to be such as to permit the free passage of air and gasses from all parts of the spaces to the air pipes.

3. Each tank or void space requiring an air pipes is to be fitted with at least one air pipe, which is located at the highest part of them.

4. Air pipes are to be arranged to provide adequate self-drainage under normal conditions. Outlets of air pipes on the open deck are to be terminated by way of return bends. Satisfactory means, per- manently attached, are to be provided for closing the vent pipes.

5. The internal diameter of each air pipe is not to be less than 50 unless specially approved otherwise.

Where tanks are to be filled by pump pressure, the aggregate area of the air pipes on the tank is

to be at least 125 % of the effective area of the filling line. Notwithstanding the above, the pump capacity and pressure head are to be considered in the sizing of the air pipes.

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6. Air pipes are to be terminated in the weather and their height is to be at least 760 above the deck except where this height may interfere with the working of the SPM, a lower height may be approved provided that the closing arrangements and other circumstances justify a lower height.

205. Ancillary components

Ancillary mechanical components such as hoists, winches, quick connect and disconnect devices, are to be designed in accordance with applicable industry standards, codes and published recommended practices deemed appropriated by the Society.