A ship of 6000 gross tons constructed after June 30, 1974, must have a fixed container, or enclosed deck area under or around each fuel oil vent, overflow, and fill pipe. This fixed container, or enclosed deck area must have a capacity of at least __________.
• 46 CFR oil fuel systems requirements for ships over 4000 or 5000 gross tons constructed after June 30, 1974 • Purpose of coamings, drip trays, and save-alls around fuel oil vents, fills, and overflows • Relationship between container volume and a realistic fuel oil spill from vent/overflow lines
• Think about how much fuel oil could reasonably spill from vent, overflow, and fill lines during normal operations before someone can react. Which capacity would actually be practical? • Compare each choice with common drum/barrel sizes used in the marine industry. How many gallons are in a standard barrel, and what fraction of that might regulations require? • Consider which answer looks like a very small token amount vs. a capacity sized to catch a short but significant overflow.
• Verify in 46 CFR (Subchapter F – Marine Engineering) the minimum capacity specified for fixed containers under/around fuel oil vents and overflows. • Convert the barrel options to gallons so you can compare all four answers in the same units. • Check whether regulations tend to choose round, practical industrial quantities (like fractions or multiples of a standard 42-gallon barrel) rather than very small arbitrary amounts.
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