Section 1 General

101. Application

1. The requirements in this Chapter apply to vessels intended for unrestricted service which are pri- marily engaged in fire fighting operation on offshore installations. The following special items re- lated to fire fighting operations are covered under the classification:

(1) Vessel’s fire fighting capabilities

(2) Vessel’s stability and its ability to maintain station while fire fighting monitors are in full operation

(3) The degree of vessel’s self-protection against external fires

2. The vessels should comply with the requirements of this chapter in addition to Ch 1 to Ch 3.

102. Submission of Data

1. In general, in addition to the plans listed in Ch 2, Sec 2, the following plans, calculations and particulars are to be submitted.

(1) Fire Fighting Plans and Data

(A) Fire-Fighting Equipment Plan, including locations of the fire pumps sea chests, fire pumps, fire mains, fire monitors, hydrants, hoses, nozzles, water-spray systems configuration, air compressor and firemen outfits.

(B) Technical details of fire pumps and monitors, including the capacity, range and water jet re- action of the monitors’, as well as water-spray system capacity data (when fitted).

(C) Details of high pressure air compressor required for filling cylinders of air breathing appara-

tus, including purity specifications.

(D) Foundations for fire-fighting pumps, their prime movers and the water monitors

(E) Sea chest arrangements for fire-fighting systems.

(F) Remote and local control arrangements for water monitors.

(G) For FFS1 only: Water-spray piping systems, including location of nozzles, pumps and valves, with system corrosion protection and draining arrangements.

(H) For FFS2 or FFS3: Details of foam generators and their capacity.

(I) For FFS3: Foam monitor arrangements, capacity and supports, including remote and local control arrangement for the foam monitors.

(2) Calculations

The following calculations are to be submitted and documented.

(A) Calculations demonstrating the adequacy of the vessel’s stability during all fire fighting operations.

(B) Calculations demonstrating adequacy of water monitor supports during monitor operations.

(C) Calculations demonstrating adequacy of propulsion power required for the vessel to maintain station during fire fighting operations.

(3) Additional Data

In addition to the submitted items required for classification, the following items submitted.

(A) Data indicating that the vessel will be capable of carrying sufficient fuel oil for

fire fighting operation and propulsion operation with all fixed water monitors in maximum required capacity for not less than:

(a) 24 hours: FFS1

(b) 96 hours: FFS2 or FFS3

are to be

continuous use at the

(B) Verification that FFS3 will be capable of foam production from fixed foam monitors for at least 30 minutes of continuous operation.

(C) Verification that FFS2 or FFS3 will be capable of foam production from mobile generators

for at least 30 minutes of continuous operation.

(D) Verification that the water monitor range, required by Table 8.1, is not less than:

(a) 120 meters : FFS1

(b) 150 meters : FFS2 or FFS3

(E) Verification that the vessel is in compliance with the minimum requirements of Table 8.1, with data on the vessel’s actual design capacities also recorded.

Guidance for Offshore Support Vessels 2015 41