StacksVerified U.S. regulatory reference

46 CFR §171.072

Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
When doing calculations to show compliance with § 171.070, the following uniform average permeabilities must be assumed:
  1. (a)85 percent in the machinery space.
  2. (b)60 percent in the following spaces:
    1. (1)Tanks that are normally filled when the vessel is in the full load condition.
    2. (2)Chain lockers.
    3. (3)Cargo spaces.
    4. (4)Stores spaces.
    5. (5)Mail or baggage spaces.
  3. (c)95 percent in all other spaces.