Section 3 Fire Extinction System

301. Fixed fire extinction systems for machinery space

1. Areas of major fire hazard are to be protected by an approved fixed fire-extinguishing system oper- able from the control position which is adequate for the fire hazard that may exist. The system is to be of fixed gas fire-extinguishing system comply with 303., water spray system, high expansion foam system or equivalent and be capable of local manual control and remote control from the continuously manned control stations.

2. In all yacht where gas is used as the extinguishing medium, the quantity of gas is to be sufficient to provide two independent discharges. The second discharge into the space is only to be activated manually from a position outside the space being protected. Where the space has a local fire-sup- pression system installed to protect fuel oil, lubricating oil and hydraulic oil located near exhaust manifolds, turbo chargers or similar heated surfaces on main and auxiliary internal combustion en- gines, a second discharge need not be required. A yacht not engaged on international sea voyages and used gas as the extinguishing medium may be provided with the sufficient quantity of gas for one discharge.

3. For class I yachts, water mist systems approved by this Society can be installed. The system is to be designed for a protection time of minimum 20 minutes.

4. Water based systems requiring fresh water are to be connected to dedicated water tanks with

capacity for minimum 5 minutes

switch-over to sea-water supply. switchover and fresh water supply

with low-level alarms arranged to

operation for the largest space to be protected and automatic

Such systems can alternatively be provided with a manual tanks design for 15 minutes operation. Fresh water service tanks

activate at the level where sufficient water will be available to

meet the requirement, can be considered as equivalent to dedicated tanks.

302.