46 C.F.R. § 169.315 Ventilation (other than machinery spaces).
Title 46 - Shipping
(a) All enclosed spaces within the vessel must be properly ventilated in a manner suitable for the purpose of the space. (b) A means must be provided to close off all vents and ventilators. (c) Living spaces must be ventilated by a mechanical system unless it can be shown that a natural system will provide adequate ventilation in all ordinary weather conditions. Provided that paragraph (a) of this section is satisfied, a vessel having only a natural ventilation system must satisfy the following: V/A≥1.4 where V is the total area of the vents in square inches and A is the product in square feet of the vessel's design waterline length times its maximum beam.
Title 46: Shipping
PART 169—SAILING SCHOOL VESSELS
Subpart 169.300—Construction and Arrangement
Hull Structure
§ 169.315 Ventilation (other than machinery spaces).
