46 C.F.R. § 174.090 Permeability of spaces.
Title 46 - Shipping
When doing the calculations required in §174.065— (a) The permeability of a floodable space, other than a machinery space, must be as listed in Table 174.090; and (b) Calculations in which a machinery space is treated as a floodable space must be based on an assumed machinery space permeability of 85%, unless the use of an assumed permeability of less than 85% is justified in detail.
Title 46: Shipping
PART 174—SPECIAL RULES PERTAINING TO SPECIFIC VESSEL TYPES
Subpart C—Special Rules Pertaining to Mobile Offshore Drilling Units
§ 174.090 Permeability of spaces.
Table 174.090_Permeability------------------------------------------------------------------------ Spaces and tanks Permeability (percent)------------------------------------------------------------------------Storeroom spaces........................... 60.Accommodation spaces....................... 95.Voids...................................... 95.Consumable liquid tanks.................... 95 or 0.\1\Other liquid tanks......................... 95 or 0.\2\------------------------------------------------------------------------\1\ Whichever results in the more disabling condition.\2\ If tanks are partially filled, the permeability must be determined from the actual density and amount of liquid carried.
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