What type of vent is required on a barge transporting No. 6 fuel oil?
Official USCG Answer & Rule Citation
Correct Answer: Option D — Gooseneck vents fitted with flame screens
Barges transporting heavy residual fuel oils like No. 6, which are non-volatile and have high flash points, are legally permitted to use simple gooseneck vents fitted with corrosion-resistant flame screens rather than complex pressure-vacuum valve systems.
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