46 C.F.R. § 153.352 B/3 and 4 m venting system outlets.
Title 46 - Shipping
A B/3 or 4 m venting system outlet must: (a) Discharge vertically upwards; and (b) Prevent precipitation from entering the vent system.
Title 46: Shipping
PART 153—SHIPS CARRYING BULK LIQUID, LIQUEFIED GAS, OR COMPRESSED GAS HAZARDOUS MATERIALS
Subpart B—Design and Equipment
Cargo Venting Systems
§ 153.352 B/3 and 4 m venting system outlets.
