9.10 Portable fire extinguishers in accommodation, service and working spaces

9.10.1 Except for the supplemental arrangements provided in paragraph 9.10.2, portable fire extinguishers in accommodation spaces, service spaces, control stations, machinery spaces of category A, other machinery spaces, cargo spaces, weather deck and other spaces should be provided in number and arrangement in accordance with the guidance provided by the Organization^footnote to the satisfaction of the Administration.

9.10.2 Table 9-3 contains supplemental recommendations for number and distribution of additional portable fire extinguishers on mobile offshore drilling units. Where the recommendations in table 9-3 differ from the guidance provided by the Organization^footnote, the provisions of table 9-3 should be followed. In all cases, the selection of the fire extinguishing medium should be based on the fire hazard for the space protected.^footnote The classes of portable fire extinguishers in the table are only for reference.

Table 9-3 Recommended number and distribution of additional portable extinguishers

Type of Space	Minimum number of extinguishers¹	Class(es) of extinguisher(s)
Space containing the controls for the main source of electrical power	1; and 1 additional extinguisher suitable for electrical fires when main switchboards are arranged in the space	A and/or C
Cranes: With electric motors/hydraulics	0
Cranes: With internal combustion engine	2	B
Cranes: With internal combustion engine	(1 in cab and 1 at exterior of engine compartment)	B
Drill floor	2	C
Drill floor	(1 at each exit)	C
Helidecks	In accordance with section 9.17	B
Machinery spaces of category A	In accordance with section 9.9	B
Machinery spaces of category A which are periodically unattended	At each entrance in accordance with section 9.9²	B
Main switchboards	2 in the vicinity	C
Mud pits, Mud processing areas	1 for each enclosed space (Travel distance to an extinguisher not to exceed 10 m for open space)	B
Note 1 Minimum size should be in accordance with paragraph 3.1.1 of chapter 4 of the FSS Code. Note 2 A portable extinguisher provided for that space may be located outside near the entrance to that space. A portable fire extinguisher placed outside near the entrance to that space may also be considered as satisfying the provisions for the space in which it is located.