🔍 Key Concepts

• 46 CFR Subchapter D provisions on fuel oil for boilers on tank vessels • Definition of flash point and why higher flash points are safer aboard tank vessels • Differences between typical flash point requirements for domestic vs. international service or various vessel types

💭 Think About

• Think about why tank vessels, which already carry flammable cargo, might require a more conservative (higher) fuel flash point than some other ship types. • Consider which of these temperatures is commonly used in regulations as a threshold between “combustible” vs. “flammable” liquids. • Ask yourself: which of these temperatures is often cited in marine safety rules for engine and boiler fuel oil to reduce fire risk in machinery spaces?

✅ Before You Answer

• Look up the exact flash point requirement for boiler fuel oil in 46 CFR Subchapter D (Tank Vessels), not in a different subchapter. • Confirm that the value applies specifically to oil used as fuel for boilers, not diesel for internal-combustion engines or cargo oil limits. • Verify that the chosen temperature is clearly stated as a minimum allowable flash point in the regulation text.