What are cargo tanks carrying grades D or E liquids on tank barges required to be ventillated with?

Correct Answer: Option B — gooseneck vents and flame screens

Title 46 CFR regulations permit tank barges carrying lower volatility Grade D and E combustible liquids to utilize standard gooseneck vents equipped with approved flame screens instead of complex pressure-vacuum relief valves, providing adequate atmospheric venting while preventing flame propagation into the cargo tanks.