Statutory Documents - MCA Publications - PYC - A Code of Practice for Yachts Carrying 13 to 36 Passengers (The Passenger Yacht Code) - Chapter 6 - Fire Protection, Detection and Extinction - 6.6 Control of Smoke Spread:
6.6 Control of Smoke Spread:
Purpose
(1) The purpose of this part is to control the spread of smoke in order to minimise the hazards from smoke by providing means for controlling smoke in atriums, control stations, machinery spaces and concealed spaces.
Protection of Control Stations outside Machinery Spaces
(2) Practicable measures shall be taken for control stations outside machinery spaces in order to ensure that ventilation, visibility and freedom from smoke are maintained within them so that, in the event of fire, the machinery and equipment contained therein may be supervised and continue to function effectively, such measures to include the provision of alternative and separate means of air supply arranged so that the air inlets of the two sources of supply shall be so disposed that the risk of both inlets drawing in smoke simultaneously is minimized; provided that, at the discretion of the Administration, such requirements need not apply to control stations situated on, and opening onto, an open deck or where local closing arrangements would be equally effective.
(3) The ventilation system serving safety centres may be derived from the ventilation system serving the navigation bridge, unless located in an adjacent main vertical zone.
Release of Smoke from Machinery Spaces
(4) The provisions of subsections (5) (6) and (7) shall apply to machinery spaces of category A and, where the Administration considers it desirable, to other machinery spaces.
(5) Means of control shall be provided for permitting the release of smoke, in the event of fire, from the space to be protected and, subject to the provisions of section 6.7(50), the normal ventilation systems may be acceptable for this purpose.
(6) Means of control shall be provided for permitting the release of smoke and such controls shall be located outside the space served so that, in the event of fire in that space, they will not be cut off.
(7) The controls required by subsection (5) shall be situated at one control position or grouped in as few positions as possible to the satisfaction of the Administration and such positions shall have a safe access from the open deck.
Draught Stops
(8) Air spaces enclosed behind ceilings, panelling or linings shall be divided by close-fitting draught stops spaced not more than 14 metres apart. In the vertical direction, such enclosed air spaces, including those behind linings of stairways, trunks, etc., shall be closed at each deck.
Smoke Extraction Systems in Atriums
(9) Atriums shall be equipped with a smoke extraction system, having fans sized such that that the entire volume within the space can be exhausted in 10 minutes or less, and which shall be activated by the required smoke detection system and be capable of manual control.
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