Fire protection regulations for towing vessels allow you to use a nonmetallic flexible hose in fuel line installations under all of the following conditions EXCEPT when ___________.

Correct Answer: Option A — fitted with Coast Guard approved garden hose fittings

Title 46 CFR allows nonmetallic flexible hoses in fuel lines only if they are wire-braid reinforced, limited to lengths not exceeding 30 inches, and visible and easily accessible. Garden hose fittings are never approved for marine fuel installations.