Under what circumstance can USCG Type B1-15 be used outside of an engine compartment?

The use of USCG Type B1-15 fuel hoses is specifically regulated to ensure safety in regards to fuel handling in marine environments. Under the conditions outlined in option B, if a break in the fuel line is estimated to release less than 5 ounces of fuel in 2.5 minutes, the hose can be safely used outside of an engine compartment. This limitation is based on the principle of managing fuel spillage and risk of fire.

The rationale behind this guideline is rooted in the design and testing of the Type B1-15 hoses, which are intended to withstand certain conditions without failure. When considering that the material of the hose might not be as fire-resistant as those specifically designed for engine compartment use, ensuring that the amount of fuel that could escape is minimal helps mitigate the risk of mishaps. If a hose line were to release a limited quantity of fuel under very specific circumstances, it has been deemed safe enough to use outside the confines of the engine compartment, where conditions may be less controlled.

By adhering to such specifications, the standards aim to protect vessel operators and the marine environment. The other options do not align with the regulated conditions of use for the Type B1-15 hoses, as they either pertain to potentially unsafe situations